When a hermit crab grows it's called molting, they go underground for months to molt.
You must always have a spare larger shell for a hermit crab as they have no natural shell of their own. Just place a larger shell in the tank and if the crab does not use it straight away, don't worry, it eventually will do as they need larger ones as they grow.
This process is called regeneration.
Weed
Regeneration.
The shell that the hermit crab adopts and wears and changes many times throughout his decades long lifetime helps him in several ways. The hermit crab has a very delicate abdomen that is protected by the shell. Without this shell, his abdomen could become punctured very easily and the crab would die. The hermit crab also carries water in his shell to keep the abdomen moist. If it were to dry out, again, the hermit crab would die. The crab balances the salinity of the water within his shell by accessing fresh or salt water as needed. The shell is also his shelter, and protects him from predators. The ideal fitting shell will allow the hermit crab to pull fully inside and to block off the opening with his large pincer.
Morphallaxis
A soft shell crab, often referred to as a softie, is a recently molted crab. Usually it's a Blue crab that is served as a soft shell dish. The crab will shed it's old shell when it has grown out of it. The new shell will be soft but only for a couple of days.
New Zealand pea crab was created in 1886.
This OS the process called budding. A new polyp will form from the part that broke off.
Because I got a brand new violin crab!
the seed cracks and after few days the seed forms an arch called the hypocotyl and radicle which grows bigger and bigger and grows into new plant
If your land hermit crab's shell gets to small get a new shell. The shell hole should be the same size as your crab's big claw or bigger Make sure your crab's new shell is clean. DO NOT FORCE YOU CRAB TO COME OUT! All you have to do is set your crab's new shell in it's cage and wait.