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BiologyHigh-oceanic, found between 225-650 m during the day and between 40-275 m at night exhibiting size stratification with depth and with adult females below 450 m (Ref. 4479). Depth range from 300-777 m in the eastern Ionian Sea (Ref. 56504). Large juveniles, sub-adults and adults from the Mediterranean are known to be migratory (Ref. 4775).