in Animal Facts Discovered in 1976, the Megamouth shark is an extremely rare species. Only 54 of them have ever been seen. 1.3k Views FLMNH Ichtyology/wikipedia Share with friends:Share with friends: See more Previous article Man Left His 9 Dogs Unfed For 2 Weeks While On Vacation Next article The most expensive coffee in the world comes from civet (a cat-sized mammal) poop.