Prionace glauca (Blue shark)
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Prionace glauca (Blue shark) [Illustration
by Ann Hecht ©]
A slim, graceful, blue shark with a long
conical snout, large eyes, curved, saw-edged, triangular upper
teeth, long narrow pectoral fins, 1st dorsal fin well behind
pectorals, and no interdorsal ridge. Upper surface dark blue, sides
bright blue, underside white.
To 3.8 m and possibly longer.
Offshore along the entire coast; circumglobal in temperate
and tropical seas.
Oceanic but approaching inshore in areas
with narrow shelves, surface to over 152 m.
seen at the surface. Bears up to 135 young. Eats bony fish,
including sardines and other herring-like fishes, anchovies, eels,
needlefish, sauries, flyingfish, hake and other cod-like fishes,
tuna, mackerel, and jacks, also small sharks, squid, pelagic red
crabs, cetacean carrion, occasional sea birds, and garbage. Usually
fairly timid when approached by divers.
offshore divers and victims of maritime accidents. Occasionally
taken by anglers, but mostly caught by offshore longliners.