Blue Shark
Prionace glauca

f8 @ 1/60s, ASA 64, Ektachrome 64 slide film, Nikon FE w 28mm, OceanEye housing, Oceanic flash


"Blue Shark," Wikipedia, the free encyclopedia.Squid are important prey for blue sharks, but their diet includes other invertebrates such as cuttlefish and pelagic octopuses, as well as lobster, shrimp, crab, a large number of bony fishes, small sharks, mammalian carrion and occasional sea birds. Whale and porpoise blubber and meat have been retrieved from the stomachs of captured specimens and they are known to take cod from trawl nets. The sharks have been observed and documented working together as a "pack" to herd prey into a concentrated group from which they can easily feed. Blue sharks rarely eat tuna, which have been observed taking advantage of the herding behavior to opportunistically feed on escaping prey. It is interesting to note that the observed herding behavior was undisturbed by different species of shark in the vicinity that normally would pursue the common prey. The blue shark can swim at fast speeds, allowing it to catch up to prey easily. Triangular teeth allows the Blue shark to easily catch slippery prey.
Offshore, New England
 
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