Onegill Eel
Ophisternon bengalense
- Least concern
- Card rarity: Common
- Fish

Ophisternon bengalense the Bengal eel, Bengal mudeel or onegill eel, is a species of fish in the family Synbranchidae. It is endemic to freshwater and brackish water rivers and swamps in Oceania and South Asia. It is normally 100 cm in maximum length.
Classification
- Class
- Actinopterygii
- Order
- Synbranchiformes
- Family
- Synbranchidae
- Genus
- Ophisternon