Pisodonophis hypselopterus
Pisodonophis hypselopterus is an eel in the family Ophichthidae (worm/snake eels). It was described by Pieter Bleeker in 1851, originally under the genus "Ophisurus". It is a tropical, freshwater and brackish water-dwelling eel which is known from Borneo, Indonesia, and Pohnpei in Asia. Males can reach a maximum total length of . Due to a lack of information on its ecology and habitat, the IUCN redlist currently lists "P. hypselopterus" as Data Deficient. It notes, however, that its habitat is under threat due to degradation of neighbouring forests.