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Shark Pictures Database
A soft bodied catshark with long nasal barbells
reaching the mouth. Body coloration plain greyish brown or dark brown above,
fading to light grey/brown or tan below. Fins may be dusky.
Eyes large and bluish-green when reflecting light. Short row of curved white
dots (ampulae of lorenzini) behind each eye. Ridge below eye.
Anterior nasal flaps large and triangular. Dorsal fins rounded with squared off
posterior margins. First dorsal slightly larger than second dorsal. First dorsal
directly above or slightly behind pelvic fins. Second dorsal directly above anal
fin. Caudal fin with distinct caudal notch.
Male 37-45cm. Female 47-55cm.
On or near the bottom over sand and mud substrates sometimes adjascent to rocky
reefs. Depth range from 90m to 250m
and distribution: Restricted to the north eastern Pacific Ocean. From Oregon
to Baja California and throughout the Sea of Cortez.
Often seen (from submersibles) resting
on the bottom.
Has been observed feeding on Moribund lantern fish in anoxic conditions. The
filetail catshark may be able to achieve neutral bouyancy through its large oil
Feeds on pelagic
crustaceans and small bony fishes.
Egg cases may be 7-11cm long with 'T' shaped lateral flanges and short tendrils.
Conservation Status: The IUCN lists the leopard catshark as 'Data
Deficient'. There is no information available on the age and growth,
longevity, fecundity, abundance or mortality of the filetail catshark. It is not
targeted by commercial fisheries or utilized for human consumption, but is known
to be incidental catch in longline and bottom trawl fisheries, although no
specific data are available. Lack of further information precludes assessment of
the Filetail Catshark beyond Data Deficient at this time.
Citation: Flammang, B.E., Ebert, D.A. & Cailliet, G.M. 2006.
Parmaturus xaniurus. In: IUCN 2013. IUCN Red List of Threatened Species. Version
The filetail catshark shares parts of its range with a
number of similar deepwater catsharks; with one of the most abundant being the
brown catshark Apristurus brunneus. The brown catshark has a more
laterally compressed head, smaller dorsal fins than its pelvic and anal fins,
and a more wedge shaped tail with a very small caudal notch.
Reaction to divers:
As this species rarely ventures above 90m it does not come in contact with