See text Ophichthys is a genus of swamp eels native to South Asia.

They live in freshwater or subterranean habitats, and some have a fossorial lifestyle.

[1] All species in this genus were formerly classified in Monopterus, but a 2020 study found them to represent a distinct monophyletic clade from Monopterus.

Due to this, the genus name Ophichthys, previously coined by William Swainson, was revived to be used for them.

[1][2] Ophichthys was formerly a wastebasket taxon used to lump in many unrelated species of eel-like fish (all of which are classified in separate genera today) and later synonymized with Monopterus until its resurrection.