Can Otocinclus Catfish Live With Oscar Fish?
❌Not Compatible
Oscar Fish is aggressive and will likely attack or stress tank mates.
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Parameter Comparison
| Parameter | Otocinclus Catfish | Oscar Fish | Overlap |
|---|---|---|---|
| Temperature | 72–79°F | 74–81°F | 74–79°F ✓ |
| pH Range | 6–7.5 | 6–8 | 6–7.5 ✓ |
| Temperament | peaceful | aggressive | Aggression risk ✗ |
| Max Size | 2" | 14" | Size mismatch ✗ |
| Min Tank Size | 10 gal | 75 gal | 75 gal minimum together |
| Diet | Herbivore | Carnivore | — |
| Care Level | intermediate | intermediate | — |
Species Profiles
Otocinclus Catfish
Otocinclus spp.
intermediatepeaceful10+ gal
Otocinclus catfish (otos) are tiny, peaceful algae eaters that are incredibly effective at controlling soft green algae and diatoms in planted tanks. They are the gold standard for planted tank algae control, often preferred over larger plecos. However, they are somewhat delicate and require established, well-maintained aquariums.
Full care guide →Oscar Fish
Astronotus ocellatus
intermediateaggressive75+ gal
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 →Other Compatible Tank Mates
For Otocinclus Catfish:
For Oscar Fish:
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