Gem tang
Zebrasoma gemmatum
This surgeonfish reaches about 20 cm in length. Its body is oval and compressed, with a tall dorsal fin but less developed than in Z. desjardinii. The coloration is deep blue-violet with many small yellow spots on the head, body and fins. The caudal fin is yellow. It has a well-developed caudal spine. It is a herbivore that grazes algae on reefs. It is generally solitary and territorial. Due to its rarity, it is highly sought after by experienced aquarists.
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
A minimum tank size of 300 liters is required. Temperature should be 24–28 °C, pH 8.1–8.4. The diet must be rich in algae (nori, spirulina) and vegetables. It is sensitive to stress and disease; quarantine is recommended. Avoid cohabitation with other surgeonfish in a small volume. Powerful filtration and moderate lighting are advised. It can be kept with peaceful, non-aggressive fish. Captive breeding is unknown.