Pacific Arctic Benthic Species
This web site was created within Distributed Biological Observatory (DBO) project and was financially supported by Polish National Science Centre (project number: DEC-2013/08/M/NZ8/00592).

Nephasoma diaphanes (Gerould, 1913)

Distinguishing characteristics
Two retractors.
Transparent or translucent body wall.
Introvert shorter than the trunk with a few short tentacular lobes.
Scattered, spinelike hooks.
Immature specimens of other Nephasoma species might be (and very often are so the literature is full of unavoidable noise on this issue) easily mistaken with N. diaphanes.

Common trunk length: 5 mm.
Maximum trunk length: 55 mm.

Whitish, transparent or translucent body wall.

It inhabits sand, silt, clay and mud.

Deposit feeder.

Life cycle
Dioecious, probably trochophore larva.

More Biology & Ecology
It often lives in foraminiferan tests or small polychaete tubes. Larger shelter dwellers may have enlarged and darker posterior papillae. It is often the most common sipunculan in the deep water communities.

Present from the wide range of bathymetric distribution; Very common in deep-sea communities.