Adults occur in near-shore coastal waters, open water of lakes and small to large rivers, and often in current in rivers. This species belongs to C. clupeaformis complex . Anadromous .
Dorsal spines (total): 0; Dorsal soft rays (total): 10 - 12; Anal spines: 0; Anal soft rays: 9 - 12; Vertebrae: 63 - 64. Body elongate and tapering, compressed laterally but less so than lake whitefish, greatest body depth at front of dorsal fin. Head relatively short, never observed with nuchal hump; eye small, adipose eyelid distinct; snout length always greater than eye diameter; upper jaw or snout projecting slightly in large males: elongated; Cross section: compressed.
Behavioural data for Atlantic whitefish is currently being reviewed.
Marine; freshwater; brackish; pelagic-neritic; anadromous . Temperate; 44°N - 43°N known only from Yarmouth Harbor, Tusket River drainage, and Leipsigate Lake in southern Nova Scotia, Canada.
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