Blue shark

Prionace glauca
Image of Blue Shark

Length Up to 12-13 ft, possibly up to 20 ft
Description Bluish gray, large slender shark with pointed snout, long pectoral fins, and anterior
Food Eats cephalopods, small bony fishes, crustaceans, mammalian carrion
Habitat Vertically migrates between the surface and 1,800 ft during the day and surface and 600 ft at night; near islands remains offshore during summer months, but appears to move closer to shore at twilight in the spring, returning to open ocean before sunrise