[1] It was described by Chen Yu-Yun and Michael Hin-Kiu Mok in 1995.

[2] It is a subtropical, marine eel which is known only from northeastern Taiwan, in the northwestern Pacific Ocean.

It is known to dwell at a maximum depth of 200 metres.

Males are known to reach a total length of 42.1 centimetres.

[1] The species epithet "opisthoproctus" refers to the posterior position of the anus, on the eel.