Hermit crab can't live long without a shell, because its stomach is soft and easy to be preyed, so it needs a shell to protect it, at the same time, it can nourish its body and give it a safe place.

Hermit crabs are named because they need to live in the shells of other software animals. Often eat mollusks such as shellfish and take the shells of other animals for yourself.

When the body grows up, the hermit crab will put on a bigger shell, and soon it will come out and put itself in a new shell. Hermit crabs need to keep looking for new shells to survive.

Extended data:

Hermit crabs have conch shells, shells, snail shells, and even take bottle caps as their home because of the harsh ecological environment. When they grow up, the hermit crab attacks the conch, kills it, hooks the top of the conch shell with its tail, supports the inner wall of the conch shell with its short legs, crawls outside the shell with its long legs, and holds the shell mouth with its big claws.

Hermit crabs live in areas with the highest density, usually in the upper part of the tidal current of coral reefs. When you turn over the stones in stagnant water, you can often find many hermit crabs with bare hands and thin shells and claws. They move quickly and will run and hide quickly.

In addition, because the ecological conditions in the tidal pool are relatively mild, it will not be impacted by the waves, and it can still store water at low tide. Most hermit crabs gather at the edge of tidal pools or under rocks in ponds.

Baidu encyclopedia-hermit crab

People's Network-Hermit Crab's Strange "New Home": Living in Lego Building Blocks