Hermit crabs are anomuran decapod crustaceans of the superfamily Paguroidea that have adapted to occupy empty scavenged gastropod shells to protect their fragile abdomens. There are over 800 species o
A hermit crab from Chabahar, Iran
A hermit crab emerges from its shell, Coenobita perlatus
Outside its shell, the soft, curved abdomen of hermit crabs, such as Pagurus bernhardus, is vulnerable.
Carcinisation is a form of convergent evolution in which non-crab crustaceans evolve a crab-like body plan. The term was introduced into evolutionary biology by Lancelot Alexander Borradaile, who desc
Porcelain crabs resemble true crabs, but are more closely related to squat lobsters and hermit crabs.