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Cadlina sparsa, common name the Dark-spot cadlina, is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Cadlinidae.
They discovered that the sea slug Chromodoris reticulata sloughs off its penis after sex, then grows a new one within approximately 24 hours.
Coghlan Island was noted as the northernmost location of specimens of Triopha catalinae, a type of sea slug.
Similarly in the sea slug Glaucus atlanticus, the reverse countershading is associated with inverted habits.
Melibe leonina, the hooded nudibranch or the lion nudibranch, a predatory sea slug species
One of the genera he described and named was the sea slug genus: Philinopsis Pease, 1860