Blue lined chiton
Tonicella undocaerulea, commonly known as the blue lined chiton, is a species of chiton.
The blue lined chiton has a head plate with zigzag white (may be blue when alive) concentric lines without a dark border. It commonly has bright electric blue stripes and flecks when alive. The girdle is hairless and brown to red or pink, often with yellow or white mottling.
The natural range of T. undocaerulea stretches from Kodiak, Alaska to Point Conception, California. It is commonly found on rocks in low intertidal and shallow subtidal waters.
This chiton grazes on corralline algae.
