Home > Invertebrates > Mollusks > Gastropods > Helmets > Phalium glaucum

Created 4/25/2026

Family Cassididae

INDO-WEST PACIFIC / HAWAII

Phalium glaucum

(Hank Lynch collection)

 

GRAY HELMET

Common in seagrass beds in shallow water, but very rarely trapped in deep water around Hawaii.  Attains 5.8 inches, 147 mm.  South Africa to Japan, Solomon Islands, and Hawaii.