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Author: Lacepède, 1801

Macrourus berglax Lacepède, 1801

Diagnosis: body moderately slender, tapering evenly to pointed tail. Head broad, with ridges well-armed with scute-like scales bearing strong spinules, length about 25% of body length; snout prominent and pointed, about equal to eye, almost or entirely scaleless underneath; mouth moderate, inferior, teeth pointed, 3-5 irregular rows in upper jaw (outer row enlarged), 1-2 rows in lower jaw; small chin barbel present, about half eye diameter; gillrakers reduced; branchiostegal rays 6. First dorsal fin with 11-13 finrays, the second finray serrated; second dorsal beginning a short distance behind and in advance of anal fin origin, with short finrays; pectoral fin with 17-20 finrays below or just before dorsal fin origin, outer finray slightly elongated. Scales large, with a serrated median keel formed by a series of strong and closely contiguous spines. Pyloric caeca 15-26 (usually 19-21), long. Anus immediately before anal fin origin. No light organ. Colour: ash grey, the chest darker, hind edges of posterior scales dark-edged, as also anal fin; the first dorsal and pectoral fins sooty. Size: to 1 m TL or more.

Habitat: benthopelagic at 100-1,000 m. Food: essentially benthic animals, on the one hand fishes and shrimps, on the other amphipods, ophiurids and polychaete worms. Reproduction: in winter and spring, perhaps extending over whole year.

Distribution: northern part of area, from Spitzbergen to Norway and westwards to the Faroes, Iceland and south-western Greenland. Elsewhere, western North Atlantic (Labrador Sea to Georges Bank and western Greenland).

Eggs, larvae and young stages. Yanulov (1962), size of ripe eggs.
Otoliths (sagitta). No data.

Roughhead grenadier (Macrourus berglax)