Several aquarium crabs demand a paludarium set up, which happens to be a tank that includes both equally water and dry land. Having said that, there are several fully aquatic choices too such as pom-pom crab and also the tiny Thai micro crabs. They are carnivorous fish in mother nature https://aquariumshops.school.blog/2023/03/18/essential-tools-for-keeping-your-fish-tank-healthy-in-malaysia/