CARCHARHINIDAE FAMILY; also called blue whaler, great blue shark, bluedog
temperate seas, often near the surface, but usually submerged to depths
of 110 to 170 fathoms in the tropics or in areas with warm water currents,
50°-68°F (10°- 20°C). It is usually replaced as the common
large pelagic shark by the white tip in areas of warm surface water.
It is present in the Mediterranean, absent from the Baltic and Red Seas,
and extremely rare in the Gulf of Mexico.
It is recognizable
by its brilliant blue color. It is dark cobalt or indigo blue dorsally,
lightening to bright blue on the flanks and white on the belly. It is
unique among sharks in that the larger teeth of the upper jaw are “saber
shaped”, with one margin broadly convex, the other concave. The
teeth are serrated along the edges. Those in the lower jaw are narrower
and very sharp. Caudal keels and spiracles are absent.
They are pelagic,
migratory and travel alone as well as in packs. Fishes, sea birds, squid
and other sharks are prey to the blue shark. While not considered one
of the most dangerous sharks, they have been implicated in unprovoked
attacks on both humans and boats.
include chumming with live or dead baits or trolling. Baits include squid,
eels, mackerel, herring and other live, whole fishes or cut baits.
The blue shark
is viviparous, giving birth to 50 or more young at a time. It does not
rate high as table fare