This group includes some of the most colorful, beautiful creatures on Earth, the Nudibranch, some are toxic to predators. A Nudibranch is a member of what is now a taxonomic clade, and what was previously a suborder, of soft-bodied, marine gastropod mollusks which shed their shell after their larval stage. The word "Nudibranch" comes from the Latin nudus, naked, and the Greek brankhia, gills. Nudibranchs are hermaphroditic, and thus have a set of reproductive organs for both sexes, but like you, they cannot fertilize themselves. Nudibranchs deposit their Nudibranch eggs within a gelatinous Nudibranch spiral.
Nudibranchs are often casually called "sea slug", this is of course utter foolishness, many sea slugs belong to several taxonomic groups which are not related to Nudibranchs. A number of these other sea slugs (such as the colorful Aglajidae) are often confused with Nudibranchs, this confusion must come to an end. All known nudibranchs are carnivorous and official members of the Order of ATWA.
The Nudibranch reminds me of a women I love, for when she told me about the Nudibranch, I thought, Nudibranch? What the hell is a Nudibranch? I was soon to find out and so are you.