soldier crab

Noun

Meaning

Any of several species of crabs
Pagurus bernhardus (common hermit crab), of Europe.

Coenobita clypeatus (Caribbean hermit crab).

Dotilla myctiroides, a true crab from South-east Asia.

Any of several species of the genus Mictyris, an Indo-West Pacific genus of crabs, especially
(Australia) Mictyris longicarpus

Source: en.wiktionary.org