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Blotchfin Dragonet (Callionymus filamentosus)

Find Blotchfin Dragonet across reef-livestock retailers on ReefDock. Compare sources, check known pricing where available, and review care information before you buy.

Blotchfin Dragonet
Photo: (c) Nazarov Lev, some rights reserved (CC BY-NC), uploaded by Nazarov Lev · cc-by-nc
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Where to buy Blotchfin Dragonet

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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  • Amazon

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  • Petco

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About Blotchfin Dragonet

The Blotchfin Dragonet is a small, elongated fish with a somewhat flattened body and large pectoral fins. It displays mottled brown, tan, and cream coloration with distinctive darker blotches and markings, particularly on the fins. The head is relatively large with small eyes positioned dorsally, and it features the characteristic venomous spines on the gill covers typical of Callionymidae.

Key facts

Origin
Indo-Pacific region, including areas from the Indian Ocean to the western Pacific, typically found in tropical and subtropical waters from depths of a few meters to moderate depths on sandy and silty substrates.
Common Health Issues
Marine ich, Fin rot, Swim bladder disorder, Bacterial infections, Fungal infections
Max Size
7
Diet Details
Dragonets are specialist feeders on small benthic crustaceans, copepods, and amphipods. In captivity, offer frozen mysis shrimp, copepod-based foods, and live copepod cultures when available. Feeding 2–3 times daily in small portions is recommended.
Diet
carnivore
Reef safety
Reef Safe
Temperament
Peaceful
Appearance
The Blotchfin Dragonet is a small, elongated fish with a somewhat flattened body and large pectoral fins. It displays mottled brown, tan, and cream coloration with distinctive darker blotches and markings, particularly on the fins. The head is relatively large with small eyes positioned dorsally, and it features the characteristic venomous spines on the gill covers typical of Callionymidae.
Aka
Blotchfin Dragonet
Min tank size
30 gallons
Care Requirements
• Minimum 30 gallon tank with fine sand substrate for burrowing behavior • Temperature range 72–78°F; maintain stability to avoid stress • pH 8.1–8.3; salinity 1.020–1.025 (marine) • Feeds primarily on small crustaceans and copepods; supplement with frozen mysis shrimp and copepod-rich foods • Peaceful but may hide extensively; provide plenty of rockwork and sand areas • Difficult feeder and sensitive to water quality; established tanks with copepod populations preferred
Difficulty Level
Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.

Research before you buy

ReefDock is the sister app to Reef Trak. Use Reef Trak to research and log fish, keep tank parameters organized, and maintain a complete livestock history. Log this fish on Reef Trak.

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