Rougheye rockfish

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Rougheye rockfish
Red rockfish.jpg
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Scorpaeniformes
Family: Sebastidae
Genus: Sebastes
Species: S. aleutianus
Binomial name
Sebastes aleutianus
(D. S. Jordan & Evermann, 1898)[1]
Synonyms

Sebastes kawaradae[2]

The rougheye rockfish (Sebastes aleutianus) is a rockfish of the genus Sebastes. It is also known as the blackthroat rockfish or the blacktip rockfish and grows to a maximum of about 97 cm (38 in) in length,[1] with the IGFA record weight being 14 lb 12 oz (6.7 kg).[3] Similar to many other members of its genus, it is extremely long-lived, and has been known to reach an age of 205 years.[4]

Description[edit]

The rougheye rockfish is so-named because of the ten or so spines found on the lower eyelid. It is pink, tan or brownish with irregular patches of brown of darker color and often a darker patch at the back of the operculum. The posterior part of the lateral line is often pink. An average adult size is about 80 cm (31 in).[5]

Distribution and habitat[edit]

Rougheye rockfish are deepwater fish, and exist between 31° and 66° latitude, in the North Pacific, and specifically along the coast of Japan to the Navarin Canyon in the Bering Sea, to the Aleutian Islands, all the way south to San Diego, California.[1] It is found between 150 and 450 m (492 and 1,476 ft), with larger fish living in deeper water than smaller ones. The temperature at these depths range from 31.4 °F (−0.3 °C) to 41 °F (5.0 °C). These fish live near the seabed over boulders and rocks surrounded by soft substrates and in caves and crevices.[5]

Behaviour[edit]

At some times of year the rougheye rockfish forms schools but during much of the year, larger fish are solitary or roam in small groups. It is among the most long-lived of fish species and individuals are believed to attain an age of over two hundred years.[5] These fish feed on shrimps, crabs, fish, amphipods and mysids. This species is oviparous and spawns between the months of February and June or sometimes between October and January.[5]

References[edit]

  1. ^ a b c Froese, Rainer (15 July 2009). "Sebastes aleutianus, Rougheye rockfish". FishBase. Retrieved 19 December 2009. 
  2. ^ "AnAge entry for Sebastes aleutianus". Retrieved 19 December 2009. 
  3. ^ http://www.iws-scalemaster.com/hall-of-champions/
  4. ^ Cailliet, G.M., Andrews, A.H., Burton, E.J., Watters, D.L., Kline, D.E., Ferry-Graham, L.A. (2001). Age determination and validation studies of marine fishes: do deep-dwellers live longer?. Exp. Gerontol. 36 (4–6): 739–764. doi:10.1016/S0531-5565(00)00239-4. PMID 11295512.
  5. ^ a b c d "Rougheye rockfish". Alaska Fisheries Science Center. Retrieved 2013-12-23.