🐠 Blue Mandarin Dragonet (Synchiropus splendidus)
🐠 Blue Mandarin Dragonet (Synchiropus splendidus)
Marine Reef-Safe Specialist Feeder • Psychedelic Blue & Orange Display Fish • Copepod-Dependent Species • Please Read Before Buying
⚠️ Important Feeding Information — Please Read First
We want to be genuinely upfront about this one: the Blue Mandarin Dragonet is a specialist feeder that hunts small live copepods and other micro-invertebrates almost continuously throughout the day. It generally won't take flake or pellet food, and in tanks without an established population of live pods to hunt, this species can slowly starve over weeks or months even while otherwise appearing healthy — this is genuinely one of the most common causes of loss with this fish. It should only go into an aquarium that's been running for many months (ideally a year or more) with mature live rock and a thriving pod population, or a dedicated refugium supplying a constant fresh supply. Please don't purchase this species for a new or recently set-up tank.
📋 The Blue Mandarin Dragonet (Synchiropus splendidus) is one of the most strikingly patterned fish in the entire marine hobby, covered in intricate psychedelic swirls of electric blue, orange, yellow, and green — a genuine pattern rather than scales, which is highly unusual among fish.
Native to shallow lagoons and inshore reefs across the Western Pacific, from the Ryukyu Islands to Australia, this species spends its days slowly picking through sand and rubble in search of copepods and amphipods.
With an established, mature tank offering a genuine ongoing food supply, it thrives as a Genuinely Spectacular Specialist Reef Display Fish.
💙🧡 Highlights
🎨 Genuinely Unique Psychedelic Pattern: Intricate swirling colours unlike any other fish
⚠️ Specialist Live-Pod Feeder: Needs an established tank with a thriving copepod population
🌿 Fully Reef Safe: Won't harm corals or most invertebrates
🐟 Peaceful Temperament: Gets along well with non-aggressive tank mates
🏠 Established Tanks Only: Not suitable for a newly set-up aquarium
🧾 A Quick Look at the Blue Mandarin Dragonet
📛 Common Name: Blue Mandarin Dragonet (Mandarinfish, Psychedelic Mandarin, Green Mandarin)
🔬 Scientific Name: Synchiropus splendidus
👨👩👧 Family: Callionymidae
🌍 Origin: Western Pacific (Ryukyu Islands to Australia)
📏 Max Size: Up to 7.5 cm (≈ 3")
🧂 Specific Gravity: 1.020–1.025
🌡️ Temperature Range: 24–27°C (75–81°F)
🧠 Care Level: Intermediate to Advanced — specialist feeding requirements
💖 Temperament: Peaceful; males territorial toward other male mandarins
🌿 Reef Safe: ✅ Yes
🏠 Min Tank Size: 190 L (≈ 50 gallons); larger with more established live rock strongly preferred
📌 Tank Level: Lower Level / Sand & Rock Dweller
🧬 Stock Type: Wild-collected as standard stock; limited captive-bred availability from specialist breeders
⏳ Lifespan: Up to 4 years+ with proper feeding, often much shorter without an established pod supply
🍽️ Diet: Carnivore (live copepods and amphipods; specialist feeder)
🐣 Reproduction: Egg Layer; pairs display a distinctive rising courtship dance at dusk

















