Complex sentence: The three-spot nudibranch, scientific name "Aldisa trimaculata", is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Cadlinidae.
Split into simpler sentences: The three-spot nudibranch, "Aldisa trimaculata", is a species of dorid nudibranch. It is a marine gastropod mollusc in the family Cadlinidae.