This beautiful mouthful of a name belong's to Hawai'i's state fish, newly reinstated to this lofty status.
Humuhumu-nukunuku-a-pua‘a means "triggerfish with a pig-like short snout". Also known as wedge tail triggerfish. Whatever you call it, a fun sight on Hawai'i's shallow reefs.
...and speaking of unusual names, who knows what a "gooey duck" is? (a local favorite where I live, definitely not a bird, and it's gotta be high on anyone's list of unusual animals)