sponge crab
nounDefinition of sponge crab
1
: a female crab bearing an egg mass
2
: any of several crabs commonly found in association with sponges: such as
a(1)
: grass crab
(2)
: a crab of the group Dromiacea that decorates its back with sponges or ascidians
b
: any of several hermit crabs of the Pacific coast of North America that excavate their homes in a living sponge (Suberites latus)