Billiton island caecilian
Ichthyophis billitonensis, the Billiton Island caecilian, is a species of amphibians in the family Ichthyophiidae endemic to the Belitung island, Indonesia. Known only from the holotype, this appears to be a small species, measuring 135 mm (5.3 in) in total length. Habitat requirements are unknown but it probably inhabits moist lowland forests. It may be threatened by habitat loss caused by opencast tin mining.