The species is native to Asia The specific name, andersonii, is in honor of Scottish herpetologist John Anderson.

[2] The preferred natural habitats of O. andersonii are forest and freshwater wetlands, at altitudes of 300–900 m (980–2,950 ft).

Ventrally it is whitish, except for the chin and lower labials which are brown.

[4] The dorsal scales, which are arranged in 17 rows throughout the entire length of the body, are smooth on the neck, feebly keeled at midbody, and strongly keeled on the tail.

Adults of O. andersonii have a total length (including tail) of 38–46 cm (15–18 in).