Apterichtus australis, the snake eel or South Pacific snake eel, is a species of snake eel native to the south Pacific Ocean where it occurs around the island groups of Rapa Iti, Pitcairn, Easter and the Kermadecs. It can be found at depths of from 12mto100mm (39feetto300feetm) inhabiting sandy areas near rocks or coral reefs. This species can reach a length of 40cm (20inches) TL.
The species epithet "australis" refers to this species' southern (Latin australis) distribution.