Dipturus batis (Linnaeus, 1758)
Blue skate
Dipturus batis
photo by Cambraia Duarte, P.M.N. (c)ImagDOP

Family:  Rajidae (Skates), subfamily: Rajinae
Max. size:  285 cm TL (male/unsexed); max.weight: 97 kg
Environment:  demersal; depth range 100 - 1000 m
Distribution:  Eastern Atlantic: Norway, Iceland, the Faroes to Senegal, including western Mediterranean and western part of the Baltic. Extirpated by trawling from much of its former range (Ref. 27438).
Diagnosis:  Dorsal spines (total): 0-0; Anal spines: 0-0; Anal soft rays: 0-0. Snout very long and pointed; length before eyes 2,5-4,0 times distance between them; disc broadly rhombic with acute outer corners; upper surface and underside smooth in young, partly prickly in larger specimens; no thorns on disc, a row of 12-18 thorns along tail; 40-56 tooth rows; upper surface olive-grey or brown with a variable pattern of light spots, underside ashy-grey to blue-grey (Ref. 3167).
Biology:  Benthic species in shelf and slope waters with a wide tolerance for depth and temperature (Ref. 4426). Found in coastal waters mainly within the 200 m range (Ref. 3167). Feeds on all kinds of bottom animals, including other skates (Ref. 114953), large individuals prefer fish (Ref. 3167). Oviparous. Males reaches maturity at ca. 115 cm TL, females at 123 cm TL; birth size at ca. 21 cm TL (Ref. 114953). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Mate in spring and the egg capsules are laid during the summer. Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 10.6-24.5 cm long and 5.0-14.5 cm wide (Ref. 41250). About 40 eggs per individual are laid annually (Ref. 41250). Flesh is marketed fresh or smoked (Ref. 35388).
IUCN Red List Status: Critically Endangered(A2bcd+4bcd) (Ref. 115185)
Threat to humans:  harmless
Country info:  Reported as occurring in the country in Ref. 4426 but

Entered by: Luna, Susan M. - 18.01.91
Modified by: Abucay, Luisa - 25.09.18
Checked by: Capuli, Estelita Emily - 31.01.18

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