Red Ruby Dragonet (Male)

Red Ruby Dragonet 

The Red Ruby Dragonet (Synchiropus sycorax) is one of the rarest, most visually stunning, and most coveted small reef fish in the entire saltwater hobby. A saturated scarlet-to-crimson body glows across the entire fish, accented with white patterns around the head, warm yellow streaks along the ventral and pectoral fins, and fine black outline details — creating an almost jewel-like appearance completely unlike any other small reef fish in the hobby. Males are the more dramatic sex, displaying an elongated first dorsal fin used in courtship and dominance displays, and showing significantly more intense red coloration than females. A recent addition to the reef hobby (first scientifically described in 2016), the Red Ruby Dragonet remains one of the most sought-after specialist fish in the entire trade.

What makes the Red Ruby Dragonet such a prized collector piece is the combination of extraordinary color saturation, delicate small size, and genuine rarity in the marine trade. Sometimes called the Red Mandarin or Ruby Mandarin, this species is related to the more familiar Mandarin Dragonet but shows saturated red coloration completely unlike any other dragonet in the trade — the kind of specialist fish that anchors a mature reef display or serves as a genuine centerpiece for a specialist keeper's tank. Adult specimens reach just 2.5 to 3 inches, making the Ruby Red suitable for both nano and larger reef systems, provided the biological requirements are met.

The Red Ruby Dragonet is completely reef-safe and will not harm corals, clams, or other invertebrates — this fish spends its days methodically picking at tiny copepods and amphipods across the rockwork and substrate. However, the Red Ruby Dragonet is a specialist obligate pod feeder that requires an established, mature reef system with a thriving copepod and amphipod population to survive long-term — this is not a beginner-friendly fish, and Red Ruby Dragonets in immature systems or systems without adequate live food will slowly starve regardless of care attempts. A connected refugium with growing macroalgae is strongly recommended to maintain a continuous supply of live copepods. For advanced reefers with mature systems, thriving pod populations, and the commitment to specialist care, the Red Ruby Dragonet delivers one of the most visually stunning small reef fish available in the entire hobby.

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🔍 Aquarium Insights

The Red Ruby Dragonet is one of the rarest and most visually stunning small reef fish available to specialist reef keepers:

• Saturated ruby-red coloration with white head markings and yellow ventral streaks — unlike any other small reef fish in the hobby
• Males display an elongated first dorsal fin used in courtship and dominance displays
• A specialist collector-grade dragonet that delivers unmatched visual impact for advanced reef keepers with mature systems and thriving pod populations — the kind of showpiece serious specialist keepers build a display around

Learn More

For detailed species information, compatibility, and care tips, visit our Species Library.