Many aquarium crabs require a paludarium set up, and that is a tank that comes with equally water and dry land. Nevertheless, there are some completely aquatic solutions too much like the pom-pom crab as well as very small Thai micro crabs. Streamlined and hugging the substrate, their fins flare https://aquariumcleaningservice.blogspot.com/2022/10/how-to-find-best-fish-tank-cleaning.html