Settling Surgeonfish

Post Larval Surgeonfish (Acanthurus sp.)

This photo likely shows a Settling Blue Tang

In the post-larval stage, Surgeonfish larvae are transparent with silvery heads and a thin, laterally compressed body. They lack scales, have undeveloped tail spines, and display narrow vertical ridges on their bodies.

During this stage, they drift in the open ocean, avoiding predators and dispersing widely. After about 50 to 60 days, they find a suitable reef habitat and settle. At this point, they are called Settling Surgeonfish, as they transition from the open ocean to the reef. Once settled, they undergo metamorphosis, transforming into their adult form with species-specific colors and features.

Post-larval surgeonfish are difficult to identify because all species look very similar at this stage. This phase is an important part of their life cycle, helping them find suitable habitats and contribute to reef ecosystems.