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Shark Pictures Database
Body coloration grey/brown to dark brown above, fading to
light grey/brown or tan below.
Eyes bluish-green when reflecting light. Snout laterally depressed with bulges
around nares (nasal openings) when viewed from above. Ridge along cheek. Subtle
ridge over eye.
Nares large. Anterior nasal flaps large and triangular. Fourth and fifth gill
openings over pectoral fins. Dorsal fins set slightly behind pelvic an anal
fins. Dorsal fins long, low and with rounded trailing edges. Second dorsal
slightly larger than first dorsal.
Mature males 45-55cm. Mature
females 48-58cm. Maximum size 69cm
On or far above the bottom. Muddy or sandy substrates. Sometimes on or adjacent to rocky
reefs. Depth range from 33m to 1290m.
and distribution: Temperate eastern Pacific Ocean. From Southeastern Alaska
to Northern Mexico. Also recorded from Panama, Ecuador and Peru
but South American sightings may be a different species.
Feeds primarily on
penaeid shrimps. Also, pelagic
crustaceans, squid and small bony fishes.
Egg cases may be 5x2.5cm. Egg cases are deposited year round. Juveniles may take
more than two years to hatch.
Conservation Status: The IUCN lists the brown catshark as 'Data
Deficient'. Although Apristurus brunneus is reported to be a relatively
common bycatch in deepwater trawl fisheries, insufficient catch and biological
information is available to assess this species beyond Data Deficient.
Species-specific monitoring of catches should be undertaken.
Vancouver Island, Canada.
The brown catshark shares parts of its range with a
number of similar deepwater catsharks. One of the commonest being the
Parmaturus xaniurus. The filetail catshark has a
laterally compressed head, and much larger dorsal fins - about the size of its
pectoral and anal fins and a more rounded tail with a prominent caudal notch.
Another sympatric species is the longnose catshark Apristurus kampae. This
catshark has a proportionately longer snout, large narrow nostrils and much
longer (taller) gill openings.
Reaction to divers:
The shallowest record of a brown catshark was from a trawl in 33m off of the
Gulf Islands in British Columbia, Canada. However, this species rarely ventures
into such shallow water so it is only rarely (if ever) encountered by divers.
Please contact Elasmodiver if you encounter this species: firstname.lastname@example.org