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Black Katy chiton

Katharina tunicata


The Black Katy chiton is an eight plated, oval shaped mollusk that is about 2 inches long (5 cm). The shiny plates give it articulated movement allowing it to move across uneven surfaces, usually rocks.


Spotted on an exposed rock at low tide. Tongue Point. Mopalia muscosa is an inter-tidal species.


Range is Alaska to Baha California. This species is protected in the USA under the Coastal Zone Management Act.

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Neil Ross
Neil Ross a year ago

It's a toothy smile, or someone has lost a denture. Wonderful spotting, Brian.

Tukup a year ago

Nice foto. Interesting info. Thanks Brian.

Spotted by

Washington, USA

Spotted on Apr 7, 2019
Submitted on Apr 9, 2019

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