Elasmodiver contains photos of sharks, skates, rays, and chimaera's
from around the world. Elasmodiver began as a simple web based
to help divers find the best places to encounter the different
species of sharks and rays that live in shallow water but it has
slowly evolved into a much larger project containing information on
all aspects of shark diving and shark photography.
There are now
more than 10,000 shark pictures and sections on shark
evolution, biology, and conservation. There is a large library of
reviewed shark books, a constantly updated shark taxonomy page, a
monster list of shark links, and deeper in the site there are
numerous articles and stories about shark encounters. Elasmodiver is
now so difficult to check for updates, that new information and
pictures are listed on an Elasmodiver Updates Page that can be
Slender body with extremely long pectoral fins. Snout long. Eyes large. Back has
a distinct deep blue sheen. Underside pale.
length 3.8 metres. 35-44cm at birth.
Tropical and temperate open ocean environments. In some areas migrates into
shallow water at night.
and distribution: Circumglobal.
The Blue shark probably has the greatest range of any shark species. Once
extremely abundant, over-fishing has caused a worldwide population crash.
Spends much of its time in the open sea where it takes advantage of ocean
currents to migrate across long distances. Takes advantage of seasonal food
supplies such as the annual squid run off the coast of California.
Litter size 4-135.
Catalina Island, California.
Similar species: The Atlantic
sharpnose shark (Rhizoprionodon terraenovae) has a similar long snout and large
round black eyes but lacks long pectoral fins and blue coloration.
Reaction to divers:Usually
encountered in baited situations where it can become aggressive. Large blues
have been implicated in attacks. Blue sharks outside of baited situations are
rarely encountered by divers.
logistics: The MV Aquatica runs trips out of Long Beach,
The standard itinerary involves continuous chumming while floating in blue
water. The most productive trips are multiple day adventures where the chum has
an opportunity to slick over a large area. Divers hang from drop lines while the
sharks circle feeding on scraps thrown in by topside personel.
There are many other blue shark dives around the world
including Eastern Canada and New England.
Other diving locations submitted by
Reef Sharks and Rays of the World. Scott W. Michael. Sea Challengers.
Sharks and Rays - Elasmobranch Guide of the World. Ralf M. Hennemann. IKAN.