Blackfin Pigfish

Interesting Info

• The Blackfin Pigfish is found in Australia on the far-northern Great Barrier Reef from Murray Island south to Broadhurst Reef, in the Coral Sea (Herald–Coringa Cays and Lihou Reef).
• Its body is orange to yellow with narrow white stripes and a bold black diagonal band across the rear half; the pelvic fins are solid black, inspiring its common name.
• The species name “loxozonus” means “slanted belt,” describing the dark diagonal marking on the flanks.
• Juveniles look similar to adults but are darker in the rear body, with the diagonal band less distinct.
• Males and females are difficult to tell apart, but like many wrasses, this species is a protogynous hermaphrodite—some females change sex to males as they mature.
• They are usually seen on outer reef slopes in clear water, often swimming well above the bottom where they forage.
• Their diet consists of hard-shelled invertebrates such as crabs, snails, and small molluscs, which they crush with powerful jaws.
• Like many wrasses, they spawn in pairs, releasing eggs and sperm into the water column where fertilised eggs drift with the plankton until hatching.
• Their lifespan has not been well studied, but they are thought to live around 10–15 years in the wild, similar to related wrasse species.
• Blackfin Pigfish help regulate reef invertebrate populations, contributing to the overall balance of coral reef ecosystems.
• At night they likely shelter in reef crevices to avoid predators, as is common among wrasses.
• Predators include larger reef fishes such as groupers and snappers, as well as reef sharks.
• Their striking appearance makes them a favourite subject for underwater photographers exploring the outer reefs of the Pacific.