Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii (ray-finned fishes)

Order: Scorpaeniformes (Scorpionfishes and flatheads)
Family: Sebastidae (Rockfishes, rockcods and thornyheads)

Genus/species:  Sebastes mystinus

Mottled blue-black to bright blue with two to four dark bands which curve around the front of the head. Sloping band from the eye toward the pectoral fin with a smaller band below. Rear edge of the anal fin is straight and slanted. 

Length up to 61.0 cm (24 in)

Weight up to max. published weight: 3.8 kg (8.4 lbs)


DISTRIBUTION/HABITAT: S. mystinus is found along the coast from Alaska to Baja California. May be found near the surface or off the bottom, generally over shallow reefs, but also around kelp and over deep reefs. Form schools, sometimes with other rockfishes.

Sebastes mystinus4329897153_34929592a1_b

DIET IN THE WILD: Jellyfish, krill, copepods, fishes, hydroids and kelp. Larger blues eat relatively more fishes.

REPRODUCTION: S. mystinus matures between 6–9 years. Fertilization is internal with copulation and transfer of sperm via a modified urogenital papilla on the male.
The females store sperm in the ovaries for several months until ovulation then fertilization of the eggs occurs. They are viviparous. The larvae mature in shallow water.

LONGEVITY: up to 44 years 

PREDATORSAdults are preyed upon by other rockfish, lingcod, sharks, dolphins and sea lions.  

CONSERVATION: IUCN Not evaluated  

REMARKS: Blues are an important sports catch in California. During some years they represent up to 31% of all fishes taken in the marine recreational fisheries.


Ron’s flickr


California Academy of Sciences Steinhart Aquarium California Rocky Coast  2017

Pacific Coast Fishes Eschmeyer and Herald 1983 Easton Press page 144


Probably More Than You Want To Know About The Fishes Of The Pacific Coast, Milton Love 1996 Really Big Press p175-177

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