Can Jack Dempsey Cichlid Live With Blue Tang (Regal Tang)?
Incompatible pH. Jack Dempsey Cichlid needs 6.5–8.0, Blue Tang (Regal Tang) needs 8.1–8.4.
Parameter Comparison
| Parameter | Jack Dempsey Cichlid | Blue Tang (Regal Tang) | Overlap |
|---|---|---|---|
| Temperature | 72–86°F | 75–82°F | 75–82°F ✓ |
| pH Range | 6.5–8 | 8.1–8.4 | No overlap ✗ |
| Temperament | aggressive | semi-aggressive | Aggression risk ✗ |
| Max Size | 10" | 12" | Similar ✓ |
| Min Tank Size | 55 gal | 75 gal | 75 gal minimum together |
| Diet | Carnivore | Omnivore | — |
| Care Level | intermediate | intermediate | — |
Species Profiles
Jack Dempsey Cichlid
Rocio octofasciata
Named after the legendary boxer, Jack Dempsey cichlids are large, territorial Central American cichlids with iridescent blue-green spangles across their dark body. They are aggressive, intelligent, and interactive — many owners report them coming to the glass to greet them. The electric blue Jack Dempsey variant is significantly less aggressive and more colorful.
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 →