Blue Damselfish
Pomacentrus caeruleus
Pomacentrus caeruleus reaches 8 cm. Its body is uniformly bright blue, sometimes with silvery reflections. Juveniles may have a paler hue. It is a territorial fish that defends its shelter. It feeds on plankton, algae and small crustaceans. In aquariums, it is active and swims throughout the water column. It can become aggressive towards conspecifics if space is insufficient. Its hardiness makes it an excellent choice for community marine tanks.
Recommended parameters
| Parameter | Recommended range |
|---|---|
| Temperature | 24–28 |
| pH | 8.1–8.4 |
| GH | 8–12 |
| KH | 8–12 |
| NO₃ | ≤ 20 |
| PO₄ | ≤ 0.1 |
Care
Care notes
Temperature 24-28°C, pH 8.1-8.4, GH 8-12, KH 8-12. Nitrates <20 mg/L, phosphates <0.1 mg/L. A minimum 100-liter tank is suitable. Omnivorous diet: flakes, pellets, brine shrimp, mysis, algae. Compatible with most reef fish, but avoid very small fish. Provide live rock for hiding places. Can be kept in groups if the tank is large (over 300 L).