Can Harlequin Rasbora Live With Blue Tang (Regal Tang)?
Incompatible pH. Harlequin Rasbora needs 6.0–7.5, Blue Tang (Regal Tang) needs 8.1–8.4.
Parameter Comparison
| Parameter | Harlequin Rasbora | Blue Tang (Regal Tang) | Overlap |
|---|---|---|---|
| Temperature | 73–82°F | 75–82°F | 75–82°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 | Omnivore | Omnivore | — |
| Care Level | beginner | intermediate | — |
Species Profiles
Harlequin Rasbora
Trigonostigma heteromorpha
Harlequin rasboras are elegant, copper-colored schooling fish with a distinctive black triangular patch on their body. They are one of the most peaceful and hardy community fish available, making them ideal for beginners. In schools of 8+, they display beautiful coordinated swimming behavior.
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 →