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Animal Encyclopedia: Beluga
Delphinapterus leucas

TAXONOMY

Delphinus leucas (Pallas, 1776), mouth of Ob River, northeastern Siberia, Russia.

OTHER COMMON NAMES

French: Belouga, marsouin blanc; German: Weissfisch; Spanish: Beluga.

PHYSICAL CHARACTERISTICS

Length 13–16 ft (3.9–4.9 m); weight 1,500–3,500 lb (700–1,600 kg).

DISTRIBUTION

Circumpolar in Arctic and subarctic; relict populations in St. Lawrence River, Canada; Cook Inlet, Alaska.

HABITAT

Marine and estuarine waters of almost any depth, depending on season and circumstance. Concentrate in shallow estuaries to molt, but also move into deep trenches where they dive to depths in excess of 3,300 ft (1,000 m). Occasionally ascend rivers. Tend to stay in polynyas and large coastal expanses of open water in winter, but can also be found in cracks and lanes in dense pack ice.

BEHAVIOR

Usually occur