Sand is important because they need to be able to sift through it to feed and burrow. As for eating the other fish. I had about 12 of the little snails that usually come on live plants and I noticed the Crabs eating them so they are keeping them under control in my tank. It depends on the type of crab, but for the most part they will eat anything they can get. Best Fiddler Crab Tank Mates: What Fish Can Live with My Fiddler Crab? Most require brackish or even saltwater. You should start with a layer of soft, sandy substrate along the bottom of the aquarium. They will also take up residence in the filter if large enough. Crab meal: What do crabs eat at home? A fiddler crab costs less than $4.00 US at a typical chain retailer and shouldn’t be much more at a local fish store. Like you already have on your Crab info they help keep the tank clean. If we have a sea crab, a river or a hermit at home, it will be a bit complicated to give animal carcasses and other foods that I would choose in their habitat. My Husband and I have a new saltwater tank that is about 2 months running. This hermit crab species grows up to 1 ½ inches and they are a great choice for tanks with small species of fish because they do not tend to bother other tank inhabitants like some hermit crabs do. They have a floating island so they can get out of the water and hopefully not out of the tank. Scarlet Reef Hermit Crab: Named for their bright red coloration, the scarlet reef hermit crab is particularly popular in reef tank environments. However, when they kill animals for their shells, hermit crabs usually do not eat the animals themselves. It’s best to do your homework before adding any crabs to your tank. What Do Freshwater Crabs Eat? You can also treat them with steamed veggies but they should be cut into tiny bits. Sometimes fiddler crabs or other crab species are sold for aquariums. Therefore, in addition to the different options that we have already mentioned, such as vegetables, fruits and some meats and mollusks, there is a specific option for them. If you desire to keep large hermit crabs, do so only in a tank of suitable environment and size, and remember they will outgrow their shells. Sorry to be so harsh, but I almost made the same mistake, and I know how important my tank is and how hard it is to get the right system setup and stable. I have red clawed crabs in my tank. Most require live insects, worms, and/or small fish to eat. Please Please Please return this crab to the fish store you got it from, your tank is only 6 months old, and it could be very harmful to the sandbed you described in your tank specs. Crabs and crayfish: Crabs eat the snails! Few thrive in freshwater. Hermit crabs are actually social animals that live in colonies, and they are called hermit crabs because they protect their soft bodies by living in shells that other sea animals discard, or that they obtain by killing other sea animals. However, others are active predators, and will eat anything they can catch. HTH Steven May catch and eat small fish, dwarf African frogs and other tank mates that live or sleep on the bottom of the tank. We had a few fish in it (Purple Tilefish, 2 clownfish, Emperor Angel, and a foxface), as well as hermit crabs and snails. You need to provide them with new housing (larger shells) as they molt and grow, otherwise, they may attack other shelled animals to get a new shell.

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