Teleostei (teleosts) >
Ovalentaria/misc (Various families in series Ovalentaria) >
Embiotocidae (Surfperches)
Etymology: Amphistichus: Greek, amphi = on both sides + Greek, stix, -ichos = row (Ref. 45335); koelzi: Named after Walter Koelz, U.S. ichthyologist (Ref. 6885).
Eponymy: Dr Walter Norman Koelz (1895–1989) was an American zoologist, botanist, anthropologist, fisheries biologist and collector whose doctorate was awarded by the University of Michigan (1920). [...] (Ref. 128868), visit book page.
More on author: Hubbs.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 0 - 9 m (Ref. 2850). Subtropical; 49°N - 26°N, 125°W - 112°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)
Dorsal spines (total): 9 - 11; Dorsal soft rays (total): 24 - 28; Anal spines: 3; Anal 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).
Body shape (shape guide): short and / or deep.
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. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Fisheries: commercial; gamefish: yes
Tools
Special reports
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Internet sources
Estimates based on models
Preferred temperature (Ref.
123201): 12.2 - 17.8, mean 15.3 °C (based on 49 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01905 (0.00827 - 0.04391), b=2.97 (2.77 - 3.17), 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.
120179): Medium, minimum population doubling time 1.4 - 4.4 years (Assuming tm<5).
Fishing Vulnerability (Ref.
59153): Low vulnerability (21 of 100).
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Nutrients (Ref.
124155): Calcium = 99.2 [54.6, 182.5] mg/100g; Iron = 1.05 [0.59, 1.86] mg/100g; Protein = 18.6 [17.6, 19.7] %; Omega3 = 0.226 [0.132, 0.386] g/100g; Selenium = 15.9 [7.3, 33.7] μg/100g; VitaminA = 12 [3, 41] μg/100g; Zinc = 0.792 [0.546, 1.208] mg/100g (wet weight);
