There are no pictures that I can legally post on this page for the Splitnose rockfish. If you’d like to see a beautiful picture of this species please do a general Google image search. You may also follow the link here for one.

How long do they live?  Splitnose rockfish can live at least 86 years in the wild [1,3].

Where are they found? This species sticks to the rocky depths of 700 to over 1,100 feet deep from the northern Gulf of Alaska to central California [2].

What do they eatThey dine on smaller creatures including krill and shrimp [2].

What do they look like? They’re small compared to the many other long-lived rockfish species I’ve wrote about. They display sharp head spines and silvery, giant eyes. The jaw is somewhat split, which is how I assume they earned their name. The largest documented splitnose rockfish was a little over 1.5 feet long and weighed only 110 grams [3].

How do they reproduce? Splitnose rockfish reproduce via sexual reproduction. They are viviparous and reach sexual maturity between 6 to 10 years of age [2]. There are no studies looking into reproductive senescence of this species.

How do scientists know how old they are? Otolith annuli age estimations [1].

So what are we lacking? I already mentioned that there’s no reproductive senescence information or decent reusable pictures (by decent, I mean a live fish swimming). There is no nuclear or mitochondrial genome information for Sebastes diploproa on the NCBI database.

Conservation status: This species of rockfish has not been evaluated by the IUCN. There’s little information regarding the population of this fish.

So, pretty much we know very little about this rockfish species. If you can contribute any information, it’s greatly appreciated.

  1. Wilson, C.D. and G.W. Boehlert, 1990. The effects of different otolith ageing techniques on estimates of growth and mortality for the splitnose rockfish, Sebastes diploroa, and canary rockfish, S. pinniger. Calif. Fish. Game 76(3):146-160.
  2. Love, Milton S., Mary Yoklavich, and Lyman K. Thorsteinson. The rockfishes of the northeast Pacific. Pages 162-164. Univ of California Press, 2002.
  3. Shanks, Alan L., and Ginny L. Eckert. “Population persistence of California Current fishes and benthic crustaceans: a marine drift paradox.” Ecological Monographs 75.4 (2005): 505-524.