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Coryphaena is a genus of marine ray-finned fishes known as the dolphinfishes, and is currently the only known genus in the family Coryphaenidae. The generic name is from Greek κορυφή and -αινα (-aina, feminine suffix). Species in this genus have compressed heads and single dorsal fins that run the entire length of the fishes' bodies. Dolphinfish are aggressive predatory fish that actively prey upon oceanic forage fishes, while in turn serving as a primary food source for many larger pelagic predators. The dolphinfish can reach up to about 40 kilograms (88 lb), and are some of the fastest-growing species in the ocean.

Source: Wikipedia