Can Goldfish Live With Blue Tang (Regal Tang)?
Incompatible pH. Goldfish needs 6.5–7.5, Blue Tang (Regal Tang) needs 8.1–8.4.
Parameter Comparison
| Parameter | Goldfish | Blue Tang (Regal Tang) | Overlap |
|---|---|---|---|
| Temperature | 65–75°F | 75–82°F | 75–75°F ✓ |
| pH Range | 6.5–7.5 | 8.1–8.4 | No overlap ✗ |
| Temperament | peaceful | semi-aggressive | Monitor ⚠ |
| Max Size | 12" | 12" | Similar ✓ |
| Min Tank Size | 20 gal | 75 gal | 75 gal minimum together |
| Diet | Omnivore | Omnivore | — |
| Care Level | beginner | intermediate | — |
Species Profiles
Goldfish
Carassius auratus
Goldfish are among the longest-kept ornamental fish, with a history spanning over 1,000 years. Despite their reputation as easy, bowl-dwelling pets, goldfish actually require spacious tanks with strong filtration. They are cold-water fish that should not be kept with tropical species. Common varieties include comets, fantails, orandas, and ryukins.
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 →