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Ruby Red Dragonet (Synchiropus sp. (Ruby Red Scooter — trade name; related to S. stellatus))

Ruby Red Dragonet

Synchiropus sp. (Ruby Red Scooter — trade name; related to S. stellatus)
Family
Dragonet / Callionymidae
Care level
Intermediate
Temperament
Peaceful
Reef safe
Reef safe
Max size
8 cm
Min tank
200 L · 53 gal
Origin
Indo-Pacific
Diet
Carnivore
Food
Copepods, Live/frozen mysis, Enriched brine shrimp, Pod-based frozen foods

Overview

The Ruby Red Dragonet is a deeply coloured dragonet with a rich red-orange body and fine mottled patterning, a striking colour variant within the scooter dragonet group. Like its relatives it spends most of its time perched on rock or sand, darting short distances to pick off small food items.

It shares the same appeal and challenges as other scooter dragonets — peaceful, reef safe, and useful for hunting small pest copepods, but reliant on a steady supply of live prey rather than doing well on flake or pellet food alone.

This is a fish for an established tank, not a new one; it needs a mature sand bed and rockwork already supporting a healthy population of pods before it arrives.

Compatibility

Ruby Red Dragonets are completely peaceful and reef safe, ignoring corals, clams, and invertebrates entirely. They can be kept with shrimp, snails, and crabs without issue.

The main compatibility concern is food competition: they should not be housed with other dragonets, mandarins, or heavy pod-eating wrasses unless the tank is large and extremely well stocked with a natural pod population.

Health & quarantine

Ruby Red Dragonets have no scales and a thin protective slime coat, so they are sensitive to copper-based medications — use tank-transfer or freshwater dip methods instead if treatment is needed. The single biggest health risk is starvation, which happens slowly and is often only noticed once the fish is visibly emaciated with a pinched belly. Quarantine is recommended but should include feeding trials to confirm the individual is actively hunting.

Frequently asked questions

Do Ruby Red Dragonets eat pest copepods?
Yes, this is one of their main appeals — they actively hunt and reduce copepod and amphipod populations in sand and rock.
Can I keep a Ruby Red Dragonet in a new tank?
Not recommended. They rely on a mature sand bed with an established pod population; a tank under 6 months old usually can't support one without heavy supplemental feeding.
Will a Ruby Red Dragonet eat pellets or flake?
Some individuals learn to take frozen mysis, but they rarely take dry pellet or flake reliably — plan on live or frozen foods as the main diet.
Are Ruby Red Dragonets reef safe?
Yes, completely — they don't touch corals or clams and are safe with all reef invertebrates.
Can I keep two Ruby Red Dragonets together?
A male and female pair can coexist in a large enough tank with plenty of food; two males will fight.

Care guidance is drawn from our own experience — every fish is an individual, so treat it as a starting point, not a guarantee. Not sure if a species suits your tank? Come ask us in store. New to the terms? Read the care-terms glossary.