Threatened species of Gymnotidae
- Threatened species of Apteronotidae
- Threatened species of Electrophoridae
- Threatened species of Hypopomidae
- Threatened species of Rhamphichthyidae
- Threatened species of Sternopygidae
- Threatened species of Knife eels
- Threatened species of Knife fishes
- Threatened species of Naked back knife fishes
- Threatened species of Electric eels