Home > Invertebrates > Shells > Tube Shells > Caecum sepimentum

Created 3/8/2026

Family Caecidae

INDO-PACIFIC / HAWAII

Caecum sepimentum

   


Kaupo, Oahu, 3 feet, 2 mm

Juvenile, Beach drift, Hapuna,
Hawaii, 2 mm

SEPARATED TUBE SHELL

Common in algal mat and soft sediment at any depth.  Slightly keeled ribs with interspaces of equal diameter, glassy with brown blotches.  Juveniles are tapering, with ribs of progressive size, formely known as Caecum arcuatum.  Attains 0.1 inch, 3 mm.  Red Sea to Japan, Hawaii, and the Society Islands.