Ringscale Threefin

Interesting Info

• The Ringscale Threefin is a tiny triplefin blenny, in Australia they are found throughout Queensland to southern New South Wales, including Lord Howe Island; they’re also reported from Tonga and parts of the south-west Pacific.
• It gets its name from the distinctive ring-like scales that cover its body.
• Males are bright orange with a jet-black head and white saddle patches, while females are mottled brown with paler saddles—making them hard to spot on rubble and algae.
• They live in very shallow water—often less than 5 m (16 ft), where wave surge brings food and shelter.
• Ringscale Threefins perch on algae-covered rocks, coral rubble and in tide pools, darting quickly when disturbed.
• They feed on tiny invertebrates and algae, picking food off the reef with rapid strikes.
• Males defend small territories, displaying their dark head and bright colours to warn off rivals during breeding season.
• Females lay small clutches of eggs on hard surfaces, which males guard until they hatch.
• Because of their small size, they are prey for larger reef fishes and rockpool hunters like wrasses.
• Their lifespan is short—like many small reef fishes, they likely live only 2–3 years in the wild.
• They belong to the triplefin group, named for the three separate dorsal fins that run along their back.
• Triplefins, including the Ringscale, are important in reef food webs because they transfer energy from tiny plankton and algae up to bigger predators.
• Although common and colourful, they are so small and shy that divers often overlook them.