|poo se-shuan (ปูเสฉวน)
‘hermit crab’, a species of decapod (ten-footed) crustacean, that belongs to the
superfamily Pagurideae, which encompasses six families and about five hundred
different species. Despite its common name, its is actually not closely related
to true crabs, as most species have long, soft abdomens, rather than a hard
carapace. Instead, hermit crabs are protected by a salvaged empty seashell
carried on its back, into which the crab's whole body can retract, and which
needs to be replaced by a larger shell as the hermit crab grows in size.
Depending on the species, hermit crab are found both in the deep sea and at
shorelines, as well as on some beaches (fig.). Also called tua se-shuan (ตัวเสฉวน)
or simply se-shuan (เสฉวน), though the latter may be confused with the name of
the Chinese province Szechuan, which in Thai is spelled the same.