Claim: Lamniformes include at least one species of shark.

The Lamniformes -LRB- from the Greek word , Lamna `` fish of prey '' -RRB- are an order of sharks commonly known as mackerel sharks -LRB- which may also refer specifically to the family Lamnidae -RRB- . It includes some of the most familiar species of sharks , such as the great white shark , as well as more unusual representatives , such as the goblin shark and the megamouth shark .   Members of the order are distinguished by possessing two dorsal fins , an anal fin , five gill slits , eyes without nictitating membranes , and a mouth extending behind the eyes . Also , unlike other sharks , they maintain a higher body temperature than the surrounding water .