Tribe:

Annelida

Class:

Polycheata

Habitat:

Hard soil, soft soil/sea grass meadow

Occurrence:

Mediterranean, North Sea, Atlantic, mainly in the sublittoral
Up to 70 m on hard substrates

Size:

Smooth, chalk-white, tapering limestone tube (15 to 25 mm) with a
triangular cross-section of 3 mm
Axial ridge with protruding tooth at the upper end of the opening with
two gill springs and pear-shaped lid