The elongated caecilian, Ichthyophis elongatus, is a species of amphibian in the Ichthyophiidae family endemic to Sumatra, including some nearby islands; however, whether these belong to this species is uncertain. Specimens allocated to this species with certainty have been collected from lowland forest and from a ravine near degraded forest. The type series varied 280–300 mm (11–12 in) in total length. It is relatively slim, with body width of 7.8–8 mm (0.31–0.31 in).