Creseis acicula is a species of pteropod, a distant type of sea-slug. It is in the family Creseidae.
Creseis aciculas size varies from . It is described as a straight-needle pteropod, and has small wings at the top of its 'head'.[1]
The species has a cosmopolitan distribution throughout the Caribbean, the Atlantic and Pacific oceans, the Mediterranean Sea and South America.[2]
The species feeds on small organisms such as diatoms, phytoplankton, archaea and larger protists.[3]