The Red Mandarin Goby (Synchiropus splendidus var. “Red”) is a stunning and peaceful marine fish admired for its vivid red, orange, and blue patterns that make it one of the most colorful saltwater species. Native to the Indo-Pacific’s coral reefs, this slow-moving, bottom-dwelling fish thrives in mature, well-established reef aquariums with abundant live rock for foraging and hiding. Red Mandarin Gobies primarily feed on copepods and other tiny live foods, so a thriving pod population or regular feeding with live or frozen alternatives is essential. They are best kept singly or as a mated pair in peaceful reef setups with stable water parameters and excellent filtration. With proper care and diet, these fish can be hardy and long-lived, adding vibrant beauty to any reef tank.
| Aspect | Details |
|---|---|
| Scientific Name | Synchiropus splendidus (Red variant) |
| Common Name | Red Mandarin Goby, Red Mandarin Dragonet |
| Origin | Indo-Pacific (Philippines, Indonesia, Australia) |
| Size | Up to 3 inches (7.5 cm) |
| Lifespan | 5–7 years |
| Temperament | Peaceful, shy |
| Tank Size | Minimum 30 gallons (preferably mature reef tank) |
| Water Temperature | 75–82°F (24–28°C) |
| pH Range | 8.1–8.4 |
| Salinity | 1.020–1.025 SG |
| Diet | Carnivore – copepods, amphipods, live or frozen microfauna |
| Tankmates | Peaceful reef-safe fish and invertebrates |
| Reef Compatibility | Fully reef safe |
| Care Level | Moderate to difficult |
| Special Notes | Requires abundant live rock and pod population; avoid aggressive tankmates |
