They gather on shipwrecks and reefs to eat and socialize. At up to 800 pounds and nine feet long, they sport jutting jaws and giant palm fronds for fins and are mottled and spotted in earth tones. They announce their presence to encroaching creatures by squeezing their swim bladders, the air sacs that help keep them afloat. Whump. Whump. WHUMP!
Read more about them here. And in the archives, more unusual fish: the Red Batfish, the Barreleye Fish, and the Sarcastic Fringehead.