Acaudina

Acaudina is a genus of sea cucumbers of the family Caudinidae. They are small, smooth and spindle-shaped, with a thin body wall and are distinguished by their absence of a caudal appendage.

Acaudina are found in tropical and subtropical waters, with habitats ranging from intertidal and estuarine zones including reefs, sandbars, seagrass meadows or within soft-bottom and anoxic mudflats, where salinity is slightly reduced. They are benthic detritivores, which ingest sediments to extract organic matter and hence play an ecological role as bioturbators.