The deep water frilled shark is a prehistoric shark which is very rarely seen. The frilled shark looks like a brown eel and weirder, it has three points on one tooth. The frilled shark is named because it has frills on it gills. It feeds on soft-bodied prey, such as squid and small fish. Believe it has six gills instead of five! Sorry, I have the same picture twice but please don't bother about it.