Oh, you — lovely warm blooded fishy, we abduct you and dissect you. If you’re gonna die, at least let me eat you. Well you told them too much, it’s too late! R.I.P.

'Warm-blooded fish' traps its own heat in the deep – BBC News

The deep-water opah becomes the first fish known to regulate its own temperature, using heat from its flapping fins to warm its heart and brain.