opalescent nudibranch

== English == === Noun === opalescent nudibranch (plural opalescent nudibranchs) A brightly-coloured nudibranch sea slug, Hermissenda crassicornis, with an orange stripe along its head area as well as white stripes on the cerata and those running down the mantle. Synonym: thick-horned nudibranch ==== References ==== opalescent nudibranch on Wikipedia.Wikipedia Hermissenda crassicornis on Wikispecies.Wikispecies Category:Hermissenda crassicornis on Wikimedia Commons.Wikimedia Commons