The otter civet, Cynogale bennettii, is a semi-aquatic civet found in forests, primarily lowland, near rivers and swampy areas of the Thai-Malay Peninsula, Sumatra, and Borneo. An additional population, only known from single specimen, occurs in northern Vietnam (with likely – but unconfirmed – records from adjacent parts of Thailand and Yunnan, China). The latter population has sometimes been considered a separate species, the Lowe's otter civet (C. lowei), in which case the common name of C. bennettii has been modified to the Sunda otter civet (a reference to its then entirely Sundaic distribution).

The otter civet possesses several adaptations to its habitat, including a broad mouth and webbed feet with naked soles and long claws. Its muzzle is long with numerous long whiskers.

The otter civet is a nocturnal species that obtains most of its food from the water, feeding on fish, crabs, freshwater mollusks, as well as being able to climb to feed on birds and fruit. Given its rarity and secretive nature it is a very poorly known species. It is listed as endangered by the IUCN. It is in many ways similar to another rare and elusive civet, the Hose's civet Diplogale hosei an endemic to the highlands of northern Borneo; the otter civet, however, has a shorter tail and does not have the whitish underparts as the Hose's civet.