Not just a
huge collection of
Elasmodiver.com contains images of sharks, skates, rays, and a few
chimaera's from around the world. Elasmodiver began as a simple web
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.
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
White tips on trailing margins
of dorsal, pectoral, and caudal fins (and to a lesser degree on pelvic
fins). Stout body. Gray to bluish gray upper body. Underside pale to white.
length 3 metres. 63 - 68cm at birth.
Deeper off shore reefs, isolated islets, and continental drop offs.
Intertidal to usually below 30 meters.
and distribution: In
the Indian Ocean from the Red Sea to Southern Africa. In the Pacific from Japan
to Australia and across to Columbia. A regular visitor at Cocos Island.
Seen singly, in pairs, and in small aggregations. Cruises reef faces usually in
deep water. Feeds on benthic, reef, and pelagic fishes such as scorpionfishes,
parrotfishes, tuna, and small sharks.
Litter number 1 - 11. Mating obviously an aggressive activity as females have
been observed with mating wounds including the top of the first dorsal bitten
Near Threatened. According to the IUCN,
silvertip sharks are subjected to bycatch in high seas fisheries and in
artisanal longline, gillnet and trawl fisheries throughout its range, and the
number of pelagic sharks landed by fishing fleets in all oceans has become
increasingly important in recent years. The meat, teeth and jaws are sold
locally and fins, skin and cartilage are exported. Few data are available,
however there is evidence to suggest that Indonesian fisheries have extirpated
local populations of this species from Scott Reef in northern Australia and
declines are suspected elsewhere. This species? site-specificity, fragmented
populations and life history characteristics indicate that even remote
populations are highly vulnerable to target shark fisheries. This information,
combined with actual and potential levels of exploitation throughout its range
result in a global assessment of Near Threatened, based on suspected overall
population declines approaching 30%.
Rangiroa, French Polynesia.
Reef Shark (Carcharhinus amblyrhynchos) has similarly coloured dorsal fin
but all other fins have black tips.
Reaction to divers:
away unless in a baited situation. I have observed extremely aggressive
behaviour as soon as bait was introduced. During one feed in Burma two
Silvertips hit the bait so hard that they carried into the reef with a
resounding crash, breaking coral and thrashing wildly. Divers have been reported
to be attacked during shark feeds in Micronesia and New Guinea.
There are silvertip shark feeds on Rangiroa in French Polynesia and there are
also a number of places where natural encounters are very common such as the
south pass of Fakarava, where silvertips mingle with enormous schools of grey
once ran out
of Phuket, Thailand to the famed Burma Banks especially Silvertip Bank where
Silvertips were regularly encountered during staged shark feeds. Recently the
sharks appearing have declined in number due to longlining.
Other than French Polynesia, diving destinations with frequent
sightings include: Socorro Islands off Baja, Cocos Island, Papua New Guinea,
Eastern and Western Australia and Micronesia.
Reef Sharks and Rays of the World. Scott W. Michael. Sea
Sharks and Rays - Elasmobranch Guide of the World. Ralf M.