Actually They are called rock crabs, Because they are Crabs born with rocks on there back
-Actually, there are lots of types of crabs that live on rocky platforms in intertidal beach zones that are NOT born with rocks on their back, but shelter under rocks to avoid wind, heat loss, protection from predators etc. If you happen to be on a beach you can lift a rock that is inhabited by crabs and can watch them scurry away and slip under another rock. Rocks do not fit perfectly to the ground, so there is a lot of space for a thin crab to fit under.
under rocks
Some do others don't.
They tend to aggregate at high densities under rocks.
Shore crabs do not live far below tide levels. They can be found under algae and rocks along the shallow shore. They are also the most common crab found along the British shorelines.
Crabs avoid predators by walking away from them and hiding under rocks and sand. They can also use their claws to keep predators away.
under the rocks odd rocks covered with fern. you can remove the leaves by putting a villager who is adept in research and building on the rock below the cliff and by cleaning the debris.you will need crabs to uncover it
Some types of crabs will make small caves or holes in rocks their homes from predators
Small crabs live under rocks or buried in wet sand at beaches. They may also live in places where there is underwater plant life so they can climb them to get food. Large crabs live farther out in the ocean. Also mainly around rocky areas as they hide under them.
from beachs where there is lots of sand and rocks or underwater
Snails, crabs, turtles, armadillos, tortoises, and lobsters all live in or have a shell.
Crabs may hide under rocks to protect themselves from rough waves, forage for food, regulate body temperature, or find shelter during low tide. This behavior also helps them avoid direct sunlight, reduce desiccation, and navigate their environment efficiently.
Hermit crabitats can have sand or coconut fibers, for they both are good for burying under.