Barbarous Butterfly-monster, 4-5 feet long Elaborate Papilio was easily distinguished from the similar-habited Sepulcro by its array of fanlike limbs and fins. In most respects the fish resembled its competitor, though it tended to favor invertebrate prey over fish. In the breeding seaon males would engage in graceful displays of their wide fans to impress potential mates. The broad fins were also used to stir up bottom muck in which the fish would conceal itself and await the approach of prey.