Firefish may refer to the following groups or species of fish:
- Nemateleotris, a genus of the family dartfish, Ptereleotridae
- Elegant firefish, purple firefish, Nemateleotris decora
- Nemateleotris magnifica, fire goby, fire fish, fire dartfish, red fire goby
- Scorpaenidae, firefish, turkeyfish, dragonfish, stingfish
- Pterois, a genus of venomous marine fish
- Devil firefish, common lionfish, Pterois miles
- Clearfin lionfish, radial firefish, tailbar lionfish, radiata lionfish, Pterois radiata
- Broadbarred firefish, Pterois antennata
- Blackfoot firefish, Parapterois heterurus
Firefish may also refer to: