Japanese Dragonet (Callionymus japonicus)

Quick facts

Appearance

The Japanese Dragonet is a slender, elongated fish with vibrant coloration featuring bright yellow, orange, and blue markings on the head and body. It has a distinctive large, venomous dorsal fin and a characteristic dragonet body shape with reduced ventral fins. The species displays intricate patterns and iridescent hues that vary by sex and mood.

Diet and feeding

Feeds primarily on small crustaceans, copepods, amphipods, and other small benthic invertebrates in the wild. In captivity, requires a mature aquarium with abundant live food sources such as copepods and amphipods; may accept frozen mysis shrimp and small frozen foods, though live food is preferred and essential for long-term success.

Difficulty and care for the Japanese Dragonet

The Japanese Dragonet is extremely challenging to maintain in captivity due to its specialized diet of tiny benthic invertebrates and difficulty acclimating to prepared foods. Success requires a mature, well-established aquarium with abundant natural food sources and meticulous water quality management.

Common health issues

Marine Ich, Fin Rot, Swim Bladder Disorder, Hole-in-the-Head Disease, Bacterial Infections

Origin and habitat

Indo-Pacific region, including Japan, China, and Southeast Asian waters. Found in shallow coastal areas and reef environments from the tropics to warm temperate zones.