Can Otocinclus Catfish Live With Blue Tang (Regal Tang)?
Incompatible pH. Otocinclus Catfish needs 6.0–7.5, Blue Tang (Regal Tang) needs 8.1–8.4.
Parameter Comparison
| Parameter | Otocinclus Catfish | Blue Tang (Regal Tang) | Overlap |
|---|---|---|---|
| Temperature | 72–79°F | 75–82°F | 75–79°F ✓ |
| pH Range | 6–7.5 | 8.1–8.4 | No overlap ✗ |
| Temperament | peaceful | semi-aggressive | Monitor ⚠ |
| Max Size | 2" | 12" | Size mismatch ✗ |
| Min Tank Size | 10 gal | 75 gal | 75 gal minimum together |
| Diet | Herbivore | Omnivore | — |
| Care Level | intermediate | intermediate | — |
Species Profiles
Otocinclus Catfish
Otocinclus spp.
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 →Blue Tang (Regal Tang)
Paracanthurus hepatus
The blue tang — Dory from Finding Nemo — is one of the most recognizable marine fish with its vivid royal blue body, black palette marking, and yellow tail. While stunning, they grow large (up to 12 inches), are highly susceptible to ich, and need tanks of 75+ gallons. They are not beginner fish despite their popularity following the movies.
Full care guide →