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Asteronotus cespitosus
Mustard/light yellow nudibranch, ~ 3 inches long and 1.5 inches wide, with white margin, raised dorsal nodules, some white, and a light brown/light beige gill structure.
Tropical nearshore waters.
Spotted in about two feet of water just west of Mokuleia Army Beach.
My pleasure. I am always happy to help whenever there is one I actually know (usually because someone else suggested it to me in the past for one of my photos)!