I think it is some sort of mollusk, perhaps a nudibranch, but have no clue beyond that.
Thw critter was swimming by rowing with the two yellow tipped appendages.
It was found near the surface during a safty stop and is between nickle and dime sized.
Specifically, it's probably a pteropod:
http://en.m.wikipedia.org/wiki/Pteropoda
http://en.m.wikipedia.org/wiki/Sea_butterfly
I hope this helps you figure it out.
Allison
I think it's a snail/slug
Specifically, it's probably a pteropod:
http://en.m.wikipedia.org/wiki/Pteropoda
http://en.m.wikipedia.org/wiki/Sea_butterfly
I hope this helps you figure it out.
Allison