Agonus cataphractus (Linnaeus, 1758)
Hooknose
Agonus cataphractus
photo by Salesjö, A.

Family:  Agonidae (Poachers), subfamily: Agoninae
Max. size:  21 cm TL (male/unsexed); max. reported age: 3 years
Environment:  demersal; marine; depth range 0 - 270 m
Distribution:  Northeast Atlantic: English Channel to Finmarken and Murman coasts and White Sea, also the Shetlands, the Faroes and southern and southwestern coasts of Iceland; southern part of Baltic.
Diagnosis:  Dorsal spines (total): 5-6; Dorsal soft rays (total): 6-8; Anal soft rays: 5-7. Unpaired breast row of plates absent, but paired plate rows cover whole breast. Snout with a pair of strong spiny hooks; numerous barbels on branchiostegal membranes. Dorsal plates 31-34 (Ref. 232). Spiny and soft dorsal fins almost fused. No spines on the hind part of the head (Ref. 35388).
Biology:  Inhabits inshore waters, deeper waters in winter in Skaggerak, preferring sandy bottoms, rarely with stones. Maximum depth reported at 270 m (Ref. 28197). Temp. range: 4.0-8.0 °C. Feeds on bottom crustaceans and polychaetes. Matures after about 1 year; a few spawning in the second year (Ref. 722). The eggs are laid in seaweed (Ref. 9900). Spawns in February - April, female laying 2,500-3,000 yellow eggs with a diameter of 2 mm. Period of development is very long and 6-8 mm long pelagic larvae hatch after 10-11 months (Ref. 35388).
IUCN Red List Status: Least Concern (LC); Date assessed: 18 October 2013 Ref. (130435)
Threat to humans:  harmless


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