The hairy-nosed otter has a short brown fur that becomes paler on the belly. Its rhinarium is covered with short hair. Its upper lip and chin are whitish. Some individuals are reddish-chestnut in colour. Its body is long, its tail slender, and its fully webbed paws have prominent claws. Head-to-body length ranges from 57.5 to 82.6 cm (22.6 to 32.5 in), tail length from 35 to 50.9 cm (13.8 to 20.0 in), and weight from 5 to 8 kg (11 to 18 lb). Its skull is flatter than that of smooth-coated otter, and it has smaller teeth. Its forepaws are 5.8 cm (2.3 in) wide and smaller than the hind paws with about 6.6 cm (2.6 in).

This species communicates with single-syllable sounds, with adult females calling the cubs with a single pause.

The hairy-nosed otter is the rarest, least-known Asian otter species and is also difficult to identify in this region. This species is distributed in Southeast Asia: Myanmar, Southern Thailand, Cambodia, Southern Vietnam, and Peninsular Malaysia. Currently, it is believed that they mainly inhabit two nature reserves in Vietnam, the Toa Daeng wetland forest in southern Thailand, and in Sumatra.

According to Wikipedia