http://en.wikipedia.org/wiki/Sarcastic_fringehead

The Sarcastic Fringehead. The only fish in the world actually capable of looking smug. Unreal!

And “sarcastic” is the actual name too… not just something I tacked on because of this lil’ bastard’s condescending manor. Anyhow, despite their fearsome appearance, they’re only about a foot long and are non-poisonous. Apparently they prey exclusively on the tears of other fish.
They can be found sheltering themselves under the countless human skulls found littering the coasts of southern California and Mexico.