Environment: milieu / climate zone / depth range / distribution range
Marine; brackish; demersal; depth range - 40 m (Ref. 31184), usually 2 - 20 m (Ref. 35388). Temperate; 0°C - ; 72°N - 49°N, 11°W - 52°E
Northeast Atlantic: White Sea, Cheshskaya Guba and Murmansk coast (Barents Sea) southward to English Channel (River Somme); eastern coasts of Scotland, England, also Irish Sea; the Orkneys, Shetlands and in shallow waters of North Sea and Baltic.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 16 - 18 cm
Max length : 52.0 cm TL male/unsexed; (Ref. 4695); common length : 30.0 cm TL male/unsexed; (Ref. 4695); max. published weight: 510.00 g (Ref. 6397); max. reported age: 10 years (Ref. 35388)
Bones are green due to harmless pigment. Skin slimy and variable color (Ref. 35388).
Inhabits rocky shores under stones, among algae and in tide pools, between tide marks down to 40 m. May remain out of water under rocks or seaweeds (Ref. 31184). Feeds on gastropods, chironomids, crustaceans, eggs and fry of fishes. Gives birth to live young (Ref. 9900). Bones colored green by the harmless pigment Vivianit (Ref. 4645). Breathes air when out of water (Ref. 31184). Mating takes place in August - September with internal fertilization of the eggs. Female give birth to 30-400 developed young (35-55mm) (Ref. 35388).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Fertilization occurs in August-September. Egg development lasts for one month. Total bearing time is five months (Ref. 6397).
Andriashev, A.P., 1986. Zoarcidae. p. 1130-1150. In P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese (eds.) Fishes of the North-eastern Atlantic and the Mediterranean. volume 3. UNESCO, Paris. (Ref. 4695)
IUCN Red List Status (Ref. 124695)
Threat to humans
Fisheries: minor commercial; aquarium: public aquariums
Estimates based on models
Preferred temperature (Ref. 115969
): 7.3 - 11.3, mean 9.4 °C (based on 310 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00380 (0.00208 - 0.00696), b=3.08 (2.91 - 3.25), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 3.5 ±0.49 se; based on food items.
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (tm=2; tmax=10; Fec=30; K=0.19-0.4).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (50 of 100) .
Nutrients (Ref. 124155
): Calcium = 42.9 [20.4, 83.4] mg/100g ; Iron = 0.312 [0.186, 0.546] mg/100g ; Protein = 16.5 [13.7, 18.9] % ; Omega3 = 0.809 [0.389, 1.685] g/100g ; Selenium = 19.9 [8.0, 44.5] μg/100g ; VitaminA = 18.2 [5.2, 59.7] μg/100g ; Zinc = 0.764 [0.505, 1.173] mg/100g (wet weight);