Can African Jewel Cichlid and Celestial Pearl Danio (Galaxy Rasbora) Live Together?

African Jewel Cichlid is a semi-aggressive species (8/10), while Celestial Pearl Danio (Galaxy Rasbora) is peaceful (2/10). This notable difference means African Jewel Cichlid may occasionally assert dominance over Celestial Pearl Danio (Galaxy Rasbora).

Large aggression gap (6 points) between African Jewel Cichlid and Celestial Pearl Danio (Galaxy Rasbora) increases stress risk for the more peaceful fish.

African Jewel Cichlid and Celestial Pearl Danio (Galaxy Rasbora) both frequent the Middle (Open Water) and Bottom (Substrate) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.

Additional behavioural considerations to keep in mind: Aggressive fish may bully and stress shy, slow-moving species.

To improve the chances of a peaceful coexistence in this community tank: Provide a significantly larger tank (at least 50% more volume than the minimum) to allow both African Jewel Cichlid and Celestial Pearl Danio (Galaxy Rasbora) to establish separate territories. Add plenty of line-of-sight breaks using driftwood, rocks, and dense planting to reduce territorial confrontations. A larger aquarium with ample hiding spots can help diffuse aggression and give the less dominant fish space to retreat.

The safe temperature window for both species falls between 22°C and 26°C. Aim for the midpoint of this range (around 24.0°C) for optimal comfort.

Both fish can tolerate a pH between 6.5 and 7.5. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 5–15 dGH. Regular testing will ensure conditions stay within this range.

To house African Jewel Cichlid and Celestial Pearl Danio (Galaxy Rasbora) together, plan for an aquarium of at least 132 litres with a minimum length of 90 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.

Because this pairing requires extra vigilance, include plenty of hiding spots — caves, driftwood, and dense plant clusters — so the less dominant fish can retreat when needed.

Specific environmental needs for this combination include: Sand (Sifters), Smooth Gravel (Sensitive Barbels), Driftwood (Digestion/Hiding), Plants - Densely covered. Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: African Jewel Cichlid is a plant destroyer, which conflicts with Celestial Pearl Danio (Galaxy Rasbora)'s requirement for live plants. Compromise where possible or prioritise the more critical need.

Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.