I mean really ugly.
Via Pharyngula , viaDeep Sea News comes FishBase! A big database of fish!
The posts in Pharyngula and Deep Sea News are about this Seattle Post Intelligencer profile of a specialist in deep sea angler fish, who among other things practice sexual parasitism. But wait, hold all the jokes about people you know who might qualify as sexual parasites until you see just how ugly these fish are. Fishbase has some wonderful photographs.