Beluga

Overview

The beluga whale is a distinctive Arctic and sub-Arctic cetacean recognized by its stark white coloration as an adult. It is closely related to the narwhal as one of the only living members of the family Monodontidae. Highly vocal and sociable, this marine mammal is frequently referred to as the sea canary due to its wide repertoire of high-pitched clicks, squeals, and whistles.

Distribution & habitat

This species inhabits cold northern waters, frequenting coastal areas, estuaries, and seasonally ice-covered seas. They often navigate through open leads and polynyas in frozen regions, moving southward or into deeper offshore areas as sea ice expands during winter months.

Appearance

Adults are entirely white, a unique trait among cetaceans that provides camouflage against icy backgrounds. Calves are born dark gray or brownish, gradually lightening over several years as they mature. Unlike many other toothed whales, belugas lack a true dorsal fin, possessing instead a low dorsal ridge that reduces friction when swimming beneath ice.

Biology & behavior

Belugas are highly gregarious animals that typically travel in pods ranging from a few individuals to hundreds. Their cervical vertebrae are unfused, allowing them to turn their heads flexibly in various directions. They produce complex vocalizations that play a crucial role in communication and navigation through echolocation.

Feeding

As opportunistic predators, they feed on a varied diet that includes fish, crustaceans, and bottom-dwelling invertebrates. They utilize echolocation to locate prey in murky waters and often hunt cooperatively near coastal river mouths and sea floors.