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
size. Dorsal fin proportionately very high and falcate. Leading edge of hammer
almost straight with central indent. Body brown to greyish brown. Ventral
length 6 metres. 50 - 70 cm at birth.
In shore and off shore reefs and surrounding tropical ocean environments.
Intertidal to 80 meters.
and distribution: Circumtropical.
over sand and reefs in search of prey. Pins stingrays to the sand with hammer
whilst disabling them. Swims with an exaggerated swaying of the hammer in order
to see forward.
The hammerhead are considered the most highly evolved of the shark families.
Bahamas I observed yellow jacks rubbing themselves along the flanks of Great
Hammerheads possibly ridding themselves of parasites. This shark was observed in
the presence of many other reef sharks which are reported to avoid it. The
presence of chum in the water may have affected normal social boundaries.
hammerhead distinguished by more pronounced scalloping of hammer and
proportionately smaller fins, Smooth Hammerhead distinguished by total lack of
indentations in leading edge of hammer, and Smalleye hammerhead distinguished by
small size and highly convex anterior margin of hammer.
Reaction to divers:Shy. Moves
away unless in a baited situation. May become very bold and make close passes at
divers but not normally aggressive. Care should be taken due to large size and
previously reported attacks on bathers.
Jim and Anna Abernethy run
week long Hammerhead and Tiger shark trips to the Bahamas from Palm Beach. Chum
is used to attract the sharks with which they have had great success.
These shark safaris also attract many Caribbean reef sharks and participants
should be aware that no cages are used. In my opinion the experience of diving
with such large sharks without the restrictions of a cage is second to none.
Read the trip report entitled: Hammers and Tigers in the Bahamas.
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.