Earmuff Wrasse

Interesting Info

• The Earmuff Wrasse is found in tropical northern Australian waters, including the Great Barrier Reef, Coral Sea, and reefs of Western Australia.
• It has a wide Indo-Pacific range from Indonesia and the Philippines eastward to Micronesia, Samoa, and Tonga, north to southern Japan, and south to Australia.
• The species is named for the distinctive large black blotches on either side of the head, which resemble a pair of earmuffs.
• Males (terminal phase) are brightly coloured with green and blue bodies, orange and red highlights, and the bold black “earmuff” marks. Females and juveniles are more subdued, usually pale green to brownish with the earmuff spots still visible.
• Juveniles are easily recognised by their smaller size and the clear dark blotches near the gill cover, which remain a reliable identification feature as they mature.
• The Earmuff Wrasse is diurnal and actively forages across reef flats, lagoons, and shallow slopes during the day.
• Its diet includes small benthic invertebrates such as crustaceans, molluscs, polychaete worms, and tiny shelled creatures like foraminiferans.
• At night or when threatened, it buries itself in sand to avoid predators, a behaviour common to many Halichoeres wrasses.
• It is a protogynous hermaphrodite: individuals start life as females and some later transform into brightly coloured males. Spawning takes place in pairs with eggs released into the water column.
• Lifespan is not specifically documented, but similar-sized wrasses live around 4–6 years in the wild.
• Predators include larger reef fishes such as groupers and snappers, making their burying behaviour and cryptic resting colours important defences.
• They play an ecological role as small invertebrate feeders, helping maintain balance on coral reefs while also providing prey for larger predators.
• Divers and snorkellers are often struck by the striking “earmuff” spots, which stand out clearly against reef backdrops, especially in males.