Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Embiotocidae
Etymology: Amphistichus: Greek, amphi = on both sides + Greek, stix, -ichos = row (Ref. 45335); koelzi: Named after Walter Koelz, U.S. ichthyologist (Ref. 6885).
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 0 - 9 m (Ref. 2850). Subtropical; 48°N - 31°N, 125°W - 116°W
Eastern Pacific: near Cape Flaterry in Washington, USA to northern Baja California, Mexico. Recorded 32 km from the Canadian border (Ref. 6885).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 31.0 cm TL male/unsexed; (Ref. 6885)
(total): 9 - 11;
soft rays: 26 - 32. Generally silvery overlaid with brassy tones; back bluish or olivaceous; lower head and lower anterior part of body tinged with red; sides with series of brown speckles which form rough narrow vertical bars; pectorals plain, other fins usually reddish (Ref. 6885).
Adults occur usually in sand beaches in surf (Ref. 2850). Viviparous, female carries the developing young (Ref. 205).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Viviparous, female carries the developing young (Ref. 205).
Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Boston (MA, USA): Houghton Mifflin Company. xii+336 p. (Ref. 2850)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 12.2 - 17.8, mean 15.3 (based on 49 cells).
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01950 (0.00858 - 0.04433), b=3.03 (2.83 - 3.23), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.4 ±0.2 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Assuming tm<5).
Vulnerability (Ref. 59153
): Moderate vulnerability (38 of 100) .