Phalium glaucum

Phalium glaucum, common name the grey bonnet or glaucus bonnet, is a species of large sea snail, a marine gastropod mollusk in the family Cassidae, the helmet snails and bonnet snails.

Distribution

This species is widespread in the Indo-Pacific, from Eastern Africa to Southern Japan and Melanesia.

This species lives on sandy bottoms with seagrass meadows, in intertidal and shallow subtidal areas to a depth of about 10 m.

Shell of Phalium glaucum can reach a length of.
These shells are helmet shaped with a large body whorl and tiny spires. The surface of shell is smooth and uniformly greyish or pale brown. The molluscs have a white body and a large yellowish or whitish foot which is edged in reddish brown. The operculum is bright yellow and fan-shaped. Usually this sea snail buries itself in the sandy areas with the long siphon sticking out.