Grunt sculpin

The grunt sculpin or grunt-fish (Rhamphocottus richardsonii) is the only member of the fish family Rhamphocottidae. It is native to temperate coastal waters of the North Pacific, from Japan to Alaska and south to California where it inhabits tide pools, rocky areas, and sandy bottoms at depths of up to 165 metres. It uses its spiny pectoral fins to crawl over the sea floor. It grows up to 9 cm in length. It frequently takes shelter in discarded bottles and cans, as well as the empty shells, such as those of the giant barnacle (Balanus nubilis). During reproduction, the female chases a male into a rock crevice and keeps him there until she lays her eggs.

Grunt Sculpin
Grunt Sculpin. Courtesy: U.S. Fish & Wildlife Service
Grunt sculpin
Grunt sculpin or grunt-fish, Rhamphocottus richardsonii
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Scorpaeniformes
Family: Rhamphocottidae
Genus: Rhamphocottus
Günther, 1874
Species: R. richardsonii
Binomial name
Rhamphocottus richardsonii
Günther, 1874


  • "Rhamphocottus richardsonii". Integrated Taxonomic Information System. Retrieved 24 January 2006.
  • Froese, Rainer, and Daniel Pauly, eds. (2006). "Rhamphocottidae" in FishBase. February 2006 version.
  • Froese, Rainer and Pauly, Daniel, eds. (2006). "Rhamphocottus richardsonii" in FishBase. February 2006 version.

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