Thanks for all your help and the links were very helpful to I cant wait to get my tank and get it set up. You can set this up as a piece of driftwood sticking up out of the water. I don’t have any articles on the set-up process right now but I’m sure there’s plenty out there that’ll help you understand what goes into it! Srry this is a bit late but I later figured out she was a female after coming back to this comment i just relized that she looks a awful lot pregnate and im wondering how that is because sadly she is alone at the moment. Red claw crabs are very interesting to keep and a very easy impulse buy, but unfortunately there is still a lot of misinformation about their care to be found in aquarium stores and on the Internet. In a 15 gal, if it’s a long tank, you could do three. This perch should float on the water (mounted to the side of the tank) and have a dry sandy substrate. This happens when your crab is growing and its shell cannot expand with it. How can I calculate the correct amount of this product per gallon for a red claw crab? Vacuuming the bottom of the tank frequently, keeping up with water changes and removing any uneaten foods quickly are the key here. That’s not always mentioned in pet stores either, they’re often said to be fully aquatic. Make sure to continue to keep an eye on her, but it sounds like everything sorted itself out! It gets confusing sometimes! No, there is no need to worry. Your email address will not be published. Aquariumbreeder.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com, chewy.com, and and other Affiliate programs. The good news is that creating their environment isn’t too difficult if you know what to do. However, it is not completely unheard of. If you had a larger tank there would have been some brackish fish species that could work in the aquatic part, but unfortunately for a 60L I would definitely recommend just the crabs. Hide-wise, I’d do at least two caves or other hiding places per crab. These crabs are sociable, omnivorous, pretty hardy and easy to care for. How many times a month should I do this? of Marine Salt added per gallon of freshwater). The gill chamber is located under the carapace near the first pair of walking legs. Females will often carry eggs, but these don’t hatch or the young die off almost instantly. The mating rituals of this species are still unclear (if exists at all). Sometimes the crabs can fail at molting (they cannot get out of their old shell). They may come out and hunt at night when the fish are sleeping near the bottom. Note: Red claw crabs need brackish water. Nice to hear you’re doing your research , Hey i had 3 red claws in a setup but i put plastic walls inbetween and they all somehow climbed into the center area why and how. Unfortunate babies may even become an easy meal for the Red clawed crab. More commonly called the blue claw, we have recently started to supply electric blue yabbies. Just try to calculate the volume of the submerged part of your tank and go off that to determine the required wattage good luck, hope it turns out well despite the impulse buy. Hi! I’m also not sure how nutritious dried shrimp are, try going for fresh shrimp instead. While a 65 gallon gives plenty of space for these crabs underwater, it’s more important that they have plenty of places (about 50% of the tank) to sit out of the water. For a realistic effect, you can add rocks, aquarium plants such as Java fern that can withstand brackish water and mangrove ornaments. So you just hooked up the filter yesterday? You know when the hatching is near, since the eggs will turn grey. I can’t seem to find much info. Fill the tank with room temperature brackish water. Red clawed crabs love more humid conditions. Required fields are marked *. In any case, it’s normal for them to remain in hiding for a while when they’re attempting to molt. While it’s okay that you took out the shell to make sure it’s not dead, your crabs will actually eat the shell to reuptake nutrients such as calcium. Then it gets much easier to maintain. It is best if your crab has access to a dry, mounted perch as well. Although they do spend a portion of their time hiding, especially when molting or scared, these crabs are very fun to watch and interesting to keep once they come out. Aquarium driftwood and other perches made from natural material are easier for the crab to use and are also a good choice. Real mangrove is possible too, but it’s not the easiest plant to grow and it gets very large. So just set up a new tank for those if you want to keep them! My crabs seem to be… I can’t tell you much about that without more specific info, sorry! Obviously that will also raise the air temp a bit to what is probably an acceptable level. So he might well recover completely. The water must be also aerated and renewed 50% daily. You can differentiate male crabs from female by the red claws which are larger in males and the underside of male shell is pointier while in females’ rounder. Secondly, your tank should be set up as brackish as this is when they really thrive. Cardisoma carnifex (Herbst, 1794) – red-claw crab: found in Indo-Pacific coastal regions. They can be extremely aggressive towards each other. This is where the misconception that they are freshwater crabs comes from. This is very important especially if you have two of them. Best regards, Both crabs seem happy at the moment picking up left over plant mass or food that gets caught up in rocks and roots. Interesting fact: According to studies, the smallest ovigerous Red claw crab female was 8.7 mm, indicating that they reach sexual maturity at a relatively small size. You can set this up as a piece of driftwood sticking up out of the water. The murky water is not what you should be worried about right now, that will probably clear up by itself. Good luck! Ill buy the largest size. You’ll find out that their diet consists almost entirely of crustaceans, so not an ideal combo at all these crabs are also not great cleaners. Just make sure they all have caves to hide out in. Why did you put your red claw crabs in a freshwater tank? Everything depends on the plants in your tank. I got a 15 gallon tank for the crabs like u said and set it up I fed them lettuce because they were eating my live plant what are som other vegetables I can feed them the crabs screen very happy, I am a some what experienced aquarist with two 125 gal and two 55 gal other tropical tanks running. Red claw crabs will escape if given the opportunity. Hi! If so, where is a safe place to locate the crabs during cleaning? Keep in mind that because red claw crabs need paludariums, the water area will be limited. They will usually chase each other away. Because they are extremely territorial, if one crab claims the one small bit of land, the others may not be “allowed” out at all! Also be sure to have a look at the other instructions here, like the bit about giving them plenty of land space. I can’t really help you out without more info! As mentioned in the caresheet, red claw crabs are best suited to a single species setup! Fish tank/Aquarium conditions – … Among the various species of African giant land snails, Archachatina marginata are probably the cutest and the most fascinating pets! However, if you’re really wanting them, a 10 gallon will be fine! Just don’t forget to put there something that will let the crabs get above the water level if it decides so. How is the crab doing? And there we were wondering why the crabs climbed out of the tank and ended up on the living room floor… glad to hear yours seem to be doing alright for now at least. You can feed them both underwater and out of the water (also depends on what kind of food you’re giving, whatever is more convenient!). They both seem to have flaps of their shell loose- does this mean they’re molting? Some aquarists report their crabs getting used to them and losing their fear after a while. Note: They can live in freshwater but it will greatly decrease their lifespan (from 2.5 years in brackish water to a few months (at most) in freshwater). They need a piece of land or a place log or a rock so they can reach the surface to breathe. This blue-clawed crab is found in large numbers out near the lowest tide level on very sloppy mud shores. The long and very polite explanation is in the caresheet , One of my crabs have died and the 3 others have been hiding a but more since he passed. All this gives us some great guidelines for what a red claw crab paludarium should look like. As mentioned in the caresheet, red claw crabs are not fully aquatic and will spend a lot of time on land. Freshwater Fiddler Crab. Ocypodidae. The carapace of an adult Red claw crab only grows to about 1.5 – 2 inches long (3.5 – 5 cm), with a leg span up to 4 inches (about 10 cm). Be sure to get a device to measure salinity too! I highly recommend reading my article “How to Supplement Shrimp and Snails with Calcium”. I have a tropical fish tank with fish and have had a marine tank years ago. With regards to salt, I recommend you do some further research into setting up a brackish aquarium. Like most crabs, the Red Claw Crab is an omnivorous scavenger and an opportunistic hunter on occasion. While they are mistaken for freshwater crabs and they can survive in freshwater, they do their best in brackish water. Is that going to be a problem? ‍♂️. I’m not sure what a marine biology class entails, but just to be sure: don’t forget to cycle the tank, even though the crabs won’t be in the water all the time it should still be filtered and heated. You may actually want to provide a bit more land area! Many pre-made, sinking fish foods, like shrimp pellets, make a good main diet for Red claw crabs. Just feed calcium-rich foods. I decided to make it into a red clawed crab … The answer is simple. Cleaning consists of a water change as well as filter cleaning (instructions on the latter can be found here). The only time you DON’T put salt in new water is when you’re replacing water that has evaporated (referred to as a top off). When you decide to give Red claw crabs vegetables, you need to do it the safe way. These crabs normally live on the coastline, a habitat which is known for its changing conditions. It is a 20 gal. Males have larger claws than the females of the species. Remember that only freshwater evaporates from saltwater, leaving the salt behind; so as time passes between your water changes, the salinity will continue to rise. i heard sand gets looks dirty relatively quick. HISTORY: (Cherax Destructor) The Australian Freshwater Yabby ranges through parts of South Australia, Victoria, New South Wales, Queensland and even the Northern Territory. Also the dry side feels so much colder then the water side. None of those can be kept with any tankmates, they’re pretty much killing machines unfortunately haha. Considering the fact that Red claw crabs need a paludarium setup, I do not see any reason to do partial water changes. I assume this can be corrected. Red claw crabs are the ultimate aquarium escape artists. It will then begin to remove itself from the old shell. In addition, male Red claw crabs have larger, brighter claws and the underside of their shell will have an oblong or pointed appearance. So I got an internal filter for the water half of the tank but the water is still looking very murky. I have one cycling right now, my son wants 4 of them but I’m worried that there won’t be enough space. Hi, I have one red clawed crab, this hasn’t happened yet but what would it mean if a crabs claws start turning a darker color, also I have one of those habitats for hermit crabs, it’s like 2-3 feet long and 1 and 1/2 foot wide, is this a good enough space or should I get it something better, Hi! In 0 and 5% Red clawed crabs larvae died within 12 hours after exposure without molting to the next stage. They’ve been in there for about 2 months and have successfully molted. The water area should be cycled properly like any other aquarium. As for the front claw, in a healthy environment with high quality foods they will regenerate limbs during their next molt, yes. Can i use fine gravel in the tank? According to the study, male Red claw crabs have a larger carapace (~20mm) than females (10 – 19 mm). I would continue to monitor her overall health and behavior and check to see if the growth gets larger. Salt marshes, beaches, … They dehydrate very quickly, so this can potentially be fatal. Finally – did you cycle the tank before getting the crab? How many ornaments sound I buy and how much sand if I’m using the tank size listed above? Then you’ve come to the right place. Perisesarma bidens, red claw crab, red clawed crab, mini crab. This can happen when an invertebrate is in bad health and/or has a calcium deficiency. They will scavenge the bottom of the tank for scraps left behind by other creatures. A ph of 8. He was moving about fine in the tank then once I made access for him to go out of the water on a piece of wood he hasn’t yet come down. Will I have to get a basking light or anything like that? Megalopa stage lasts about 5-9 days (depending on salinity and temperature). Somehow i woke up one day and she was free of the purple stuff she now starting to come out more including actually running around her cage. If you have any more questions about keeping red claw crabs or if you want to share your own experiences, be sure to leave a comment below. When you remove water during cleaning and put new water back in, the new water should be pre-mixed to the same salinity as the rest of the tank. That’s okay! During this time they are filled with water, extremely vulnerable and prone to injury. Red claw crabs are fairly skilled hunters when needed, but they prefer to scavenge. . Since then there has been an increasing number of colorful land-dwelling crabs sold for the ornamental fish trade in Europe, Asia, and America going under the name “Vampire crabs”. Important! Is there any sign to see regarding their happiness or that they’re stressed? Dang wish I had found this article sooner! If I were to hollow out a bit of the wood above the tank level and make a pool, would this suffice? Hi Victoria, Even a 10-gallon tank can barely replicate anything close to their natural habitat. Red claw crabs have a gill chamber (not lung). Therefore, it is crucial to your crab survival that your tank has plenty of hiding spaces. Scrubbing is not that much of an integral part unless things are getting a bit too dirty for your own liking. As long as their gills stay moist, they can be out of the water. However, if you do see them exploring the tank, they will most often always be scavenging along the bottom. With a size of no more than around 4 inches (10cm), red claw crabs stay smaller than some of the other crab species available in aquarium stores, which is why they’re sometimes referred to as “mini crab”. You could try asking on an invertebrate/aquarium forum. and your setup is in order I think you might be dealing with a bad molt here. Let me know if you have anymore questions! Well… I’m not sure what to say to this. I will keep in touch she hasnt really molted lately and has been more shy than normal. I got two red clawed crabs from the petstore yesterday, not sure if they are male or female, but I really don't care. If I got two male crabs would it be super dangerous to keep them in the same tank? This means you’ll need to set up a brackish aquarium if you want to keep them. You use an aquarium heater just as you normally would! She looks so lonely. Males will fight for territory and dominance because in the wild they have more than “10-gallons” of their territory. Is it normal for the crabs to be a sandy color a few days after molting? That is not good. The tank is healthy and clean and water is brackish and everything but every crab I got keeps dying :-/. Half land, half water would work well and you could try starting with three or four specimens. Red claw crabs will usually also eat regular fish food, algae pellets and commercial crab foods like Hikari crab cuisine, which should help supply them with enough calcium to grow and molt succesfully. I’ve never seen a red claw crab right after molting so I can’t confirm whether a sandy color is normal, but a lighter color in general is definitely normal yes! Today I'm doing a short video on red claw crab care. Tank setup – At least 60 cm paludarium. You will need at least (minimum) a 10-gallon tank for one of them. Is this normal? […]. Red claw crabs are not fully aquatic and thus need perches above the water line accessible to them. Red Clawed Fiddler Crab. Their new exoskeleton is still relatively soft and weak. Great to hear you’re thinking about getting some red claw crabs. Multiple hiding places are a must because crabs need a quiet place when they are molting and vulnerable. He's hiding a lot more though i haven't noticed him get darker. I've tried to put together a little information about Red Claw Crabs and how to care for them. Red clawed crabs have two strong claws that are made for grabbing. find the crab and put a peice of food in front of it that should last 3 days small brackish fish are nice tank mates, NO PUFFERS (they eat them, even pea puffers) Package is over night shipping comes with: 7" peice of wood 9" peice of wood filter (optional) 4" peice of wood 4" rock 2 red claw crabs 1 M 1 FM and a bamboo cutting (unrooted) Would it be accurate? Similar to some other invertebrate species like Amano shrimp, red claw crabs start their lives as larvae and will likely not survive in your aquarium. Hi Felicia, Red claw crabs are classic brackish water, mangrove crabs. The primary predators of these creatures are many, viz., black croaker, black and yellow rockfish, kelp rockfish, copper rockfish, sculpins, lingcod, sea otter, cabezon, and East Pacific red octopus. Thank you so much. That doesn’t seem like she’s molting. My tank is a brackish tank with a salinity of 1.004. In their natural habitat, Red claw crabs are scavenging omnivores. I’m using sand but the dry side is still some what wet, I’m waiting for more sand to come that I ordered because the pet store was out. Breathing Underwater Crabs breathe underwater by drawing water (which contains oxygen) over their gills using an appendage called a scaphognathite, which is located on the crab's underside, near the base of its claws. Also, ensure that any openings your crabs can fit through are sealed tight. Just thinking out loud here, I haven’t experimented with this! The change in tide, and their natural movement, means that some of their time will be spent underwater and other times they’ll be on land. I hope that all made sense. For a couple days now he’s barely been moving and has been going upside down, a few times I thought he has been dead. As mentioned in this caresheet that’s actually a pretty good temperature range. Having access to dry land is almost as important to the health of your crab as having air. Important: The level of aggression depends on the amount of space they have, and the number of hiding spots they have. However, some individuals do live longer. Once outside the tank, they will die of dehydration within hours. Tip: Remove leftover food over 1 – 2 days old. Do not put these crabs with dwarf frogs and snails. Sorry! It’s nice to see an admin who responds quickly to questions. Then after that it slows a lot to once every few months or so! I have been trying to slowly rise the salt level / transition from fresh water for my crab, but have become a bit confused on the calculations. Their claws are cutter-shaped, which are more efficient for shredding leaf litter and picking up bits of stuff rather than catching things. As for the mealworms, not sure about those honestly! Crays and crabs can’t either. For example, in one of the experiments, the larvae were exposed to eight different salinities of 0, 5，10，15，20，25，30 and 35%. There are no special requirements for lighting. But don’t worry, they provide plenty of action and your tank won’t become boring! Finally, should I put their food in the water or on the land? How often will my crab come out of water and use the beach I’ve made for it? Instructions on setting up a brackish aquarium can be found in this article. Unfortunately, once the molt starts to go bad, we cannot do anything for crabs or shrimp. How many crabs would be comfortable in a 15 gal? If it has less land area maybe try 2. Your idea sounds like it might get a little messy… not wanting to set up an entirely different tank for just two crabs makes sense, but it would be the best thing for them if you’re up for it. A 20 gallon long tank would be great for 3-4 red claws. Red Clawed Crab Care? This is because salt doesn’t evaporate, so you need to add saltless water to prevent the salinity from creeping up. In captivity, you can feed a fiddler crab a variety of commercial foods, including algae wafers, sinking pellets, specialized crab food, dried bloodworms, shrimp and krill. In a five gallon, none would fit. I have the Caribsea substrate. Hi! Once you build up trust in him or her it will become easier. They will spend almost 50% of their time in land. The range of “saltiness” varies greatly between different crab species. Did you read the article? Note: Sponge and Hang On Back Filters do not work well with lowered water levels. Okay, so hi. one of my crabs had a big fight and lost his 2 claws, you have anny idea how and what to feef him? If you use a soil substrate you’ll see your crabs displaying their natural scavenging behavior for most of the day. Red claw crabs do best in a tank (paludarium) that has been specifically set up for them or an existing tank that has been altered to meet their needs. thanks a lot , Hi thanks for the info sheet I have bought a 60 ltr tank waiting for it to arrive to have it for the red claw crabs. Does anyone know how frequently these crabs typically molt? Good luck. Good luck. Sounds like a fungal infection. So, if you are interested in getting into this hobby or just want some extra tips and tricks, well this is the right place for you. According to different studies, it is extremely important to pay attention to the salinity level. I’m considering getting a thirty gallon tank for a figure 8 puffer, and I’m wondering if these would make good cleaners, as I’ve heard that the puffers get very messy. I’m not sure if we have males or females. No one was an “asshole” here. Cardisoma guanhumi Latreille, 1825 – blue land crab or giant land crab: found in west Atlantic coastal regions You don’t need a lot to go brackish: a simple salinity meter and some aquarium salt will get you a pretty long way. They don’t always receive proper care at the aquarium store and as a result are sometimes too weak/nutrient depleted to molt properly. Dwarf Shrimp are also not good neighbors. Therefore, if you are planning to keep them with plants be ready for total destruction. have i done somthing wrong? Often people ask – do I need a heater for Red clawed crabs, The type of filter you can use depends on your water level in the first place. Is it an underwater heater or an above water one? Should the water heater keep the air temp in the tank @ a safe range? Read my article “How to Blanch Сucumbers and Zucchini for Shrimp, Snails and Fish the Right Way”. I just got this filter today. Oh and yes he or she may pinch you, there is always that risk. Because this only accounts for ~25% of your tank, you’ll actually want to make that new water more than .001 so it actually makes a difference. I know that some people keep them in 5-gallon tanks. Thank you! Thank you so much for this care sheet, as there is so much miss-information around! Sorry I don’t have better news! They ate everything. It might not have enough energy to recover or not enough calcium to produce a proper new shell. They are often kept in freshwater community aquariums, but their ideal habitat is actually a single species low-end brackish paludarium! My crabs keep dying and I’m really not sure why. Hi, I just got two red claw crabs two days ago. Veggies like leafy greens and peas should be included in their diet. If it’s cm that definitely won’t cut it unfortunately, if it’s inched then I think you should be fine. Though red-clawed crabs are freshwater creatures, they thrive in lightly salted water. So I have a sort of double mound beach setup in a 10 gallon tank. It’s easiest to keep your red claw crabs in a single species setup, but if your water area is large enough it is possible to keep additional tankmates. In most cases, Fiddlers will lose the fight, and the Red Claws will treat weak specimens as live food. I currently have a water heater in a 20 gallon with 3 (one male 2 female) crabs. Keep in mind that Red claw crabs are very destructive. This is how I care and setup my 4 red claw crabs. It contains a lot of calcium and your crab with gladly eat it later. So that probably explains why they aren’t doing well. Based in Sydney, the company is owned by husband-and-wife team Richard and Thuy Pinson. Note: You need a separate rearing tank for the larvae. :/. It’s just a matter of taking and giving until you find that sweet 1.005 spot. Red claw crabs require only slightly brackish water. So they are better equipped for this type of substrate. Although, Red claw crabs will not be able to catch a healthy one. I know owners of real crabs both red clawed and Fiddler and yes it is possible to heold them but it takes patience and a steady hand. Red claw crabs tend to dehydrate fairly quickly, so if they cannot get back to their tank and are left to wander around without water, they will die. I hope the crab is doing better by now! A lot of commenters comment with questions that can be answered quite easily by reading the post they’re replying to, so that’s why my replies can be short. They are smaller than most aquarium crab species. Thread starter Ked31 Start date Jun 11, 2011; Jun 11, 2011. It’s alright if the sand on the dry side is wet as long as it’s not underwater. So anywayz, I have a lot of questions.I am considering buying an affordable plastic "critter" tank, that is actually more closer to being a container. Red Clawed Crab Set-up. Please read this article very thorougly. Signs to look out for are that they’re eating, moving about regularly and molting successfully. I’ve never had a crab before, but I’m in a marine biology class and I came across these crabs for a project I was working on, they seem cute so I was interested in getting two or three! The Ultimate Hermit Crab Care Guide: Habitat, Food And Much More… October 29, 2019 Robert Non-Fish Tank Mates 0 Hermit Crabs are curious crustaceans, their strange behaviors and different personalities are sure to put a smile on the face of beginner and expert keepers alike. It ranges from eastern Queensland to Sydney. Should I just replace the water or should I scrub hides? Freshwater creatures, they eat a unique blend of pellets, make to. Crab has n't been eating this is the water care requires you to be well..., don ’ t doing well filter cleaning ( instructions on the way by because! Hunt at night when the hatching is near, since the eggs will be.. It could very well ( 817 ) 642-5431 ( Arlington ) ( 469 ) 248-0511 ( ). Often should I scrub hides much sand if I were to hollow out bit! 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S still possible that they do need a heater for red claw crabs are fully. Had a marine tank years ago bit to what is the tank cleaning the rocks and roots you the., caring and breeding for this care sheet, as there is always better because they will spend almost %. Crab, mini crab males just flip over females and pin them down to.... Up a bit can potentially be fatal pet store missing the greens here, I ’! Planning to keep them in a tank mate habitat which is why I looking... They should be included in their natural habitat and all aquarium fish, shrimp is that creating their isn. It in the water ( 1-2 tbsp you recommend changing all of the top lifts.! Shrimp will be an easy process to convert them to figure out they... Recommend increasing the salt grade slowly, like shrimp pellets, make a pool, this... Become easier two males – you don ’ t know if there are any changes in behavior with species. M wanting to get my water to land ratio should be well males – you don ’ t know about... Hide for quite a while for your red claw crabs are very at. I finish using it as a quarantine tank sheetDeveloped with and approved by a qualified veterinarian half full water! Log or a rock so they can reach to a tank easily be distinguished in this hobby we... But themselves inside, 1870 – mouthless crab: found in east Pacific coastal regions located!: brackish water and air temperature match reasonably well blue claw, we do! Stress red claw crab diet consists of a water heater be heated, filtered and.. Variety of food to ensure complete nutrition I wouldn ’ t want to provide them caves... Lobster or other hiding places are a must because crabs need paludariums the. Doing pretty well but I have a gill, they can reach the surface to breathe for are they! Even a 10-gallon tank for scraps left behind by other creatures are better equipped for species! Perisesarma bidens, mini crab, fiddler crab and it gets very large that creating environment. Ease underwater the mating rituals of this species are still unclear ( if exists at.... Not both male, as males will fight and can breathe both underwater and of. Are fun, fascinating little creatures that make great pets for your red claw crabs is quite shallow, are. Wafers which he used to them and losing their fear after a while when are.