Pacific Mud Eel
Pythonichthys asodes
- Least concern
- Card rarity: Common
- Fish

The Pacific mud eel is an eel in the family Heterenchelyidae. It was described by Richard Heinrich Rosenblatt and Ira Rubinoff in 1972. It is a tropical, marine eel which is known from the eastern central Pacific Ocean, including Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Panama, and Nicaragua. It dwells at a maximum depth of 17 metres, typically habituating muddy substrates in estuaries. It is able to survive in water with a low salt concentration. Males can reach a maximum total length of 47.2 centimetres. The eels' diet consists primarily of benthic gastropods and worms, and bivalves.
Classification
- Class
- Actinopterygii
- Order
- Anguilliformes
- Family
- Heterenchelyidae
- Genus
- Pythonichthys