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Black and tan mussel. The shell has lines that seem to go both horizontal and vertical. When the black and tan layer gets chipped off the shell, it is very blue underneath, so it looks like Mytilus trossulus when it is more worn down. I believe Mytilus trossulus does not have those vertical lines on the shell like these do
Rocky area of the beach covered in life: including gooseneck barnacles, seaweed, starfish, anemones, and more.
Spotted on Nov 3, 2018
Submitted on Jan 8, 2019