Click on photo to enlarge. Scale line in photo equals 1cm unless otherwise specified.
* Species which are commonly encountered on the beach.
Island, WA, intertidal
Anacortes, WA, intertidal
Whidbey Island, subtidal, spawningCalliostoma ligatum (Gould, 1849)
Blue Topsnail *intertidal
to 30m southern California to central
Alaska size to 30mm
is common intertidally. It can be a dull gray-brown color to
blue-white with reddish rings. It is frequently covered with
Young shells can easily be confused with Margarites pupillus, but this shell does not have an open umbilicus like the margarite. When the surface of the shell
erodes away, it reveals a blue color.
(synonym - Calliostoma costata)
just offshore Haida Gwaii, BC
Akoya platinum (Dall, 1890)
subtidal, 75-700m size to 32mm
southern California to southern Alaska
This is a rare species to find. The shell appears smooth with only faint spiral ridges.
This page last revised: 5-25-2019