Actinopterygii (ray-finned fishes) > Scorpaeniformes
(Scorpionfishes and flatheads) > Rhamphocottidae
Etymology: Rhamphocottus: Greek, rhamphos = bill, peak + Greek, kottos = a fish without identificaction (Ref. 45335); richardsonii: Named after John Richardson, naturalist and explorer (Ref. 6885). More on author: Günther.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 0 - 165 m (Ref. 2850). Temperate; 66°N - 32°N
North Pacific: Japan to Alaska and at least Santa Monica Bay, southern California, USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 8.9 cm TL male/unsexed; (Ref. 48784)
Inhabits intertidal areas and to 165 m depth, in tide pools and rocky areas but also sand bottoms (Ref. 2850). Frequently observed taking shelter in empty shells, including those of the giant barnacle, Balanus nubilis, and discarded bottles and cans (Ref. 48784). Young feed on zooplankton and invertebrate and fish larvae; adults feed also feed on crustaceans (Ref. 28499). May use its pectoral fins to crawl over rocks and seaweed (Ref. 6885).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
A female chases a male into a rock crevice. She keeps him there until she lays her eggs (Ref. 28499).
Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott, 1991. Common and scientific names of fishes from the United States and Canada. Am. Fish. Soc. Spec. Publ. (20):183 p. (Ref. 3814)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 118484)
Threat to humans
Aquarium: public aquariums
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 4.7 - 15.9, mean 8.9 °C (based on 558 cells).
Phylogenetic diversity index (Ref. 82805
= 1.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.37 se; based on food items.
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .