The Oceanic whitetip shark ("Carcharhinus longimanus"), is a large species of requiem shark, in the genus "Carcharhinus". The Oceanic whitetip reef shark reaches a maximum length of 4 metres, and can weigh as much as 170 kg (370 pounds). This species of shark can be distinguished among other species by its large, rounded first dorsal fin, and its very long, wide, paddle-like pectoral fins.