Mopalia ciliata (Sowerby, 1840)
Common name(s): Hairy chiton
|Mopalia ciliata, about 3 cm long, under a rock overhang at Cape Flattery|
|(Photo by: Dave Cowles, July 2010 )|
How to Distinguish from Similar Species: The mossy chiton Mopalia muscosa has thicker, stiff hairs and is not so brightly colored.
Geographical Range: Aleutian Islands to Baja California. Common in Puget Sound and the open coast, and is the most common Mopalia near Juneau, Alaska.
Depth Range: Mid to low intertidal
Habitat: Rocky intertidal and floats. Most common in crevices or on the bottom or downward-facing slopes of rocks. Sometimes among mussels.
This species grazes on algae and also on hydroids, bryozoans, sponges,
and other small animals. It feeds mainly at night and on foggy or
cloudy days. Eggs are about 0.2 mm diameter and gray-green.
Larvae swim freely after hatching, developing all 8 valves. In CA
they settle about day 8 and metamorphose to miniature adults by day 16.
Adults grow about 11-40 mm per year. Predators include the ochre
|Main Page||Alphabetic Index||Systematic Index||Glossary|
Johnson and Snook, 1955
McConnaughey and McConnaughey, 1985
Morris et al., 1980
O'Clair and O'Clair, 1998
Ricketts et al, 1985
General Notes and Observations: Locations, abundances, unusual behaviors:
Rosario Invertebrates web site provided courtesy of Walla Walla University