Can Oscar Fish Live With Yellow Tang?
Incompatible pH. Oscar Fish needs 6.0–8.0, Yellow Tang needs 8.1–8.4.
Parameter Comparison
| Parameter | Oscar Fish | Yellow Tang | Overlap |
|---|---|---|---|
| Temperature | 74–81°F | 75–82°F | 75–81°F ✓ |
| pH Range | 6–8 | 8.1–8.4 | No overlap ✗ |
| Temperament | aggressive | semi-aggressive | Aggression risk ✗ |
| Max Size | 14" | 8" | Similar ✓ |
| Min Tank Size | 75 gal | 75 gal | 75 gal minimum together |
| Diet | Carnivore | Herbivore | — |
| Care Level | intermediate | intermediate | — |
Species Profiles
Oscar Fish
Astronotus ocellatus
Oscars are large, intelligent South American cichlids often called 'water dogs' for their interactive personality. They recognize their owners, beg for food, and can be hand-fed. However, they grow fast, produce massive waste, and need at least a 75-gallon tank.
Full care guide →Yellow Tang
Zebrasoma flavescens
The yellow tang is the most iconic reef tank fish — a solid lemon-yellow disc that constantly grazes algae across the rock work. They are active, hardy, and excellent algae controllers for reef tanks. However, they need large tanks (75+ gallons minimum), can be aggressive toward similar-shaped fish, and have become significantly more expensive following collection bans in Hawaii.
Full care guide →