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
isc. Tip of snout slightly extends beyond anterior disc margin. Spiracle
origin below mid-eye.
Dorsum brown or greyish-brown without
markings. Ventrum white with grey/brown band around margin. Tail relatively
long. Tail may have a dusky centerline. Small
dorsal fin in front of tail spine. No lateral skin folds present on tail. Tail
length 72-84% of disc length. Tail robust before tail sting; tapering thereafter
to low caudal lobe.
length approx 40cm.
Habitat: Sandy and rocky substrates
Listed as mainly occurring at depths between 155-205m on continental shelf.
However, sepia stingrays are regularly encountered by divers around shallow
reefs in Japan.
Southern Japan, Korea and Taiwan. Not reported from Mainland
Listed by the IUCN as NEAR THREATENED. Its preference for
rocky habitat limits its susceptibility to trawling, however gillnet, set net
and longline fishing activities in parts of its range are likely to take this
species as bycatch. No information is available on such bycatch. Longline
fisheries in areas such as Taiwan often employ gear that would regularly take
this species (similar sized demersal batoids taken on bottom set lines are a
commonly marketed product). Fisheries in the Asian region are generally
unmanaged and unregulated and pressure on the continental shelf is intense.
This species' occurrence in deeper water was shown by Nakaya and Shirai (1992)
in the Okinawa Trough, south of Japan. Bycatch through any expansion of
deepwater demersal fishing activities will likely increase pressure on deeper
subpopulations in those areas.
Habitat alteration in inshore areas may indirectly impact the species.
Photographs: Tateyama, Chiba, Japan.
species: No other Urolophid rays live within
range of this species. Young Dasyatid rays such as the
look vaguely similar but have much longer, thinner tails.
to divers: Skittish
but can be
approached with slow movements.
logistics: Relatively common in Southern Honshu,
Japan. Divers attending the shark feeds in Tateyama should be able to find this
ray within a few dives by scanning the sandy areas between reefs.
Last, P.R. & Marshall, L.J. 2006.
Urolophus aurantiacus. The IUCN Red List of Threatened Species 2006:
Downloaded on 22 October 2017.
Rays of the
World - Last, White, de Carvalho, Seret, Stehmann, and Naylor. CSIRO.