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Dallia pectoralis

(Alaska blackfish)


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Family : Mudminnows ; Usually found in heavily vegetated swamps and ponds ; occasionally in medium to large rivers and lakes with abundant vegetation[1]. Migrations appear to be limited to inshore or upstream movements to spawning grounds in the spring and (presumably) reverse migrations to deeper water in the fall [2]. Oviparous , batch spawner [3]. Known for their tolerance to cold water : survives exposures to -20¦C for up to 40 minutes, and can survive for a few days after complete freezing of parts of the body, even the head [4][5]. Uses its esophagus as auxiliary breathing organ[6].

Common Names

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Click on the language to view common names.

Common Names in Chinese:


Common Names in Danish:

Sort hundefisk

Common Names in Dutch:

Grote waaiervis

Common Names in English:

Alaska blackfish, Blackfish

Common Names in French:


Common Names in Georgian:


Common Names in German:

Alaska Schwarzfisch, Alaska-Schwarzfisch, Fächerfisch

Common Names in Mandarin Chinese:

阿拉斯加黑魚, 阿拉斯加黑鱼

Common Names in Polish:

Dalia (ryba), Dalia a czarna ryba, Dalia a. czarna ryba

Common Names in Russian:

Chernaya ryba, Dalliya, даллия, черная ры, черная рыба

Common Names in Swedish:



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Physical Description

Species Dallia pectoralis

Males are commonly 11 cm (Total Length) in length when caught/marketed, but may be as large as 33 cm (Total Length).


Biome: Marine .


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Dalia Pectoralis • Dalia pectoralis Bean • Dalia pectoralis Bean, 1880 • Pylodictus olivaris (Rafinesque • Silurus olivaris Rafinesque


Name Status: Accepted Name .

Last scrutiny: Data last modified by FishBase 11-May-1994

Similar Species

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Members of the genus Dallia

ZipcodeZoo has pages for 1 species and subspecies in this genus:

D. pectoralis (Alaska Blackfish)

More Info

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Further Reading

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Data Sources

Accessed through GBIF Data Portal March 01, 2008:



  1. Page, L.M. and B.M. Burr (1991). A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. [back]
  2. Morrow, J.E. (1980). The freshwater fishes of Alaska. University of. B.C. Animal Resources Ecology Library. 248p. [back]
  3. Breder, C.M. and D.E. Rosen (1966). Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p. [back]
  4. Borodin, N.A. (1934). The anabiosis or phenomenon of resuscitation of fishes after being frozen. Zool. Jahrb., Abt. Allg. Zool. Physiol. Teire 53(3): 313-342. [back]
  5. Scholander P.F., W. Flagg, R.J. Hock and L. Irving (1953). Studies on the physiology of frozen plants and animals in the Arctic. J. Cell. Comp. Physiol. 42, Supp. 1: 1-56. [back]
  6. Bone, Q. and N.B. Marshall (1985). Biologie der Fische. Gustav Fischer Verlag, Stuttgart, Germany. 236 p. [back]
Last Revised: 2014-11-21