This is a smal fish with four to six short spines arranged in a straight row in front of the dorsal fin, and with the gill membranes free from the isthmus; it differs from other stickleback species in BC in dorsal spine number. For further information, refer to McPhail (2008).
Source: McPail, J. D. 2008. The Freshwater Fishes of British Columbia. University of Alberta Press, Edmonton.