Mandarin Dragonet | Synchiropus splendidus

The Mandarin Dragonet (Synchiropus splendidus), also known as the Mandarin Goby, is one of the most colorful and recognizable fish in the marine aquarium hobby. Featuring an intricate pattern of electric blue, orange, and green, this stunning species is prized for its vibrant appearance and fascinating behavior. Unlike most reef fish, Mandarin Dragonets spend much of their time slowly gliding along rockwork and the substrate while hunting tiny crustaceans and other microorganisms.

Care Level: Difficult / Specialized

Maximum Size: 3 inches

Minimum Tank Size: 20 gallons (mature systems recommended)

Temperament: Peaceful

Reef Safe: Yes

Diet: Carnivore / Microcrustacean Feeder

Temperature: 74–80°F

Specific Gravity: 1.023–1.026

pH: 8.0–8.4

Mandarin Dragonets require mature, well-established aquariums containing abundant live rock and a thriving population of copepods and other small crustaceans. These specialized feeders continuously hunt throughout the day and may struggle to obtain sufficient nutrition in newer or smaller systems. While some captive-bred or conditioned individuals readily accept frozen or prepared foods, many wild-caught specimens rely heavily on live copepods. A refugium or regular supplementation of live copepods can be especially beneficial. Macroalgae systems in particular are encouraged for dragonets, as they provide shelter and food for copepods to explode in population.