The northern spearnose poacher (''Agonopsis vulsa''), also known as the window-tailed sea-poacher or the windowtail poacher,Common names for ''Agonopsis vulsa'' at www.fishbase.org. is a fish in the family
Agonidae
Agonidae is a family of small, bottom-dwelling, cold-water marine fish. Common names for members of this family include poachers, Irish lords, sea ravens, alligatorfishes, starsnouts, hooknoses, and rockheads. They are notable for having elongate ...
.''Agonopsis vulsa'' at www.fishbase.org. It was described by
David Starr Jordan
David Starr Jordan (January 19, 1851 – September 19, 1931) was the founding president of Stanford University, serving from 1891 to 1913. He was an ichthyologist during his research career. Prior to serving as president of Stanford Univer ...
and Charles Henry Gilbert in 1880, originally under the genus '' Agonus''.Jordan, D. S. and C. H. Gilbert, 1880 (2 Nov.) ef. 18354''Description of a new agonoid (Agonus vulsus), from the coast of California.'' Proceedings of the United States National Museum v. 3 (no. 162): 330-332. It is a
marine
Marine is an adjective meaning of or pertaining to the sea or ocean.
Marine or marines may refer to:
Ocean
* Maritime (disambiguation)
* Marine art
* Marine biology
* Marine debris
* Marine habitats
* Marine life
* Marine pollution
Military
* ...
, temperate water-dwelling fish which is known from the eastern Pacific Ocean, including southeastern Alaska to southern California, USA. It dwells at a depth range of . Males can reach a maximum total length of .
The northern spearnose poacher is sometimes used as a public
aquarium
An aquarium (plural: ''aquariums'' or ''aquaria'') is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aq ...