Nudibranchs: The Sea Lemon
Anisodoris nobilis, or the noble dorid nudibranch, is also known as the sea lemon. This name is not only attributable to its yellow color, but apparently also to a citrusy smell it can give off when it is handled.
Unlike many tinier nudibranchs, the sea lemon can reach up to around five inches in length. These specimens, though, were only about two or three inches long.
They are known to eat sponges that are similarly colored to themselves so that they stay camouflaged.