Greenfish is used as the common name of several unrelated groups of fish:
- Ascension wrasse, Thalassoma ascensionis <small>(Quoy & Gaimard, 1834)</small>
- Bluefish, Pomatomus saltatrix <small>(Linnaeus, 1766)</small>
- Murray cod, Maccullochella peelii peelii <small>(Mitchell, 1838)</small>
- Pollock, Pollachius pollachius <small>(Linnaeus, 1758)</small>
- St. Helena wrasse, Thalassoma sanctaehelenae <small>(Valenciennes, 1839)</small>
"Greenfish" was also formerly used to refer to green cod, fresh or freshly-salted Atlantic cod (Gadus morhua).
Greenfish may also refer to: