Spotted Mandarin Goby (Synchiropus picturatus)

The Spotted Mandarin Goby (Synchiropus picturatus) — also called the Picturesque Dragonet or Target Mandarin — is one of the most stunning small reef fish in the hobby. Its body is a constellation of white-rimmed green and black "target" spots over a velvety blue-green background, no two patterns alike. Despite the common name, this is actually a dragonet, not a true goby. Peaceful, slow-moving, and completely reef-safe, they spend their day picking copepods off live rock — making them the perfect jewel for a mature reef tank. Browse our other saltwater reef supplies and livestock.

Care Guide

Spotted Mandarins are rated intermediate for one reason only: feeding. They are obligate micro-predators that hunt copepods and amphipods all day long. A mandarin in a brand-new tank will slowly starve no matter how much food you offer. The non-negotiables: an established reef tank (6+ months old) with plenty of live rock, a healthy copepod population (refugium or copepod habitat strongly recommended), and patience as they learn the tank. Many specimens — including ours — will eventually accept frozen mysis, brine, and high-quality pellets, but a live pod base is what keeps them thriving long-term.

Water parameters are standard reef: stable temp, pH, and salinity matter more than chasing exact numbers. They're slow, peaceful, and unbothered by most tank mates. Keep one per tank unless you have a confirmed male/female pair in a 75+ gallon system.

Specifications

Compatibility

Best tank mates: peaceful reef fish that won't out-compete a slow eater — clownfish, small gobies, firefish, cardinalfish, anthias, dwarf angelfish, and reef-safe wrasses. Completely safe with corals, clams, shrimp, snails, and hermit crabs.

Avoid: other Spotted Mandarins (unless a confirmed pair in a 75+ gallon tank with a huge pod population), aggressive feeders (large wrasses, hawkfish, dottybacks) that out-compete them for pods, and any predator fish big enough to eat them. Mandarins also have a mild skin toxin that deters most fish from biting them, but they're still vulnerable to bullying.

Recommended Foods & Supplies

• Adaptive Reef Copepod Habitat — essential pod-breeding shelter; sustains your mandarin's primary food source.
• Bulldawg Live Brine Shrimp Nauplii — live food many mandarins will pick at once settled.
• Brightwell AngeLixir — amino acid soak to boost color and entice them onto prepared foods.
• SFBB Fish Food Icebox — keep frozen mysis cold on the trip home.
• Browse all aquarium foods — pellets, frozen, live, freeze-dried.

FAQ

Is this really a goby?
No — despite the common name, it's a dragonet (family Callionymidae). True gobies belong to the family Gobiidae. Mandarins are slower, more deliberate hunters and have a much different body shape.

Will it eat in my tank?
Only if you have a sustained copepod population. Our specimens have been fed in our system and many take frozen mysis and brine, but you should not bring one home to a tank under 6 months old or without visible pod activity. Add a refugium or copepod habitat well before purchase if your tank is borderline.

What's the difference between this and a regular Mandarin?
The Spotted (Picturesque) Mandarin (S. picturatus) has bold target-shaped spots; the Mandarin Dragonet / Green Mandarin (S. splendidus) has psychedelic squiggly stripes. Same care needs, slightly different look.

Can I keep two together?
Only as a confirmed male/female pair in a 75+ gallon tank with abundant pods. Two males will fight, and two females will compete for limited food. Singles are far easier.

Is it reef safe?
Yes — completely. They won't pick at corals, clams, or any inverts. Their only "diet conflict" is competing for copepods with other pod-eaters.

Are they jumpers?
Not typically — they stay on the rocks and substrate. A lid is still wise, but mandarins are among the lowest jump-risk reef fish.