Blue-Ring Topsnail

Blue Ring Top Snail

Calliostoma annulatum

Physical Description

The Blue Ring Top Snail, scientifically known as Calliostoma annulatum, possesses a conical and flat-sided shell that can reach up to 30 mm in diameter. Its shell features beaded spiral sculpturing and exhibits a shiny purple and gold coloration. The head and foot of the Blue Ring Top Snail are orange with dark mottling. It coats its shell with a thin layer of slick mucus.


Blue Ring Top Snails are abundant and conspicuous, commonly found on rocks, algae, and giant kelp.

Geographical Range

This species is specifically found along the eastern Pacific coast, ranging from Alaska to Baja California, Mexico.


Blue Ring Top Snails are omnivorous, but they prefer to feed on hydroids, bryozoans, sponges, compound ascidians, and other colonial invertebrates.

Other Species