Edy Setyawan, Ph.D.

The study of the populations, movements, and conservation of endemic epaulette sharks in Raja Ampat archipelago, Indonesia

In Indonesia’s Raja Ampat archipelago, a global hot spot for marine biodiversity, Raja Ampat epaulette sharks (Hemiscyllium freycineti) are estimated to be declining, despite full protections for this species, at both the regional and national levels. These small bottom-dwelling sharks live in shallow coastal ecosystems such as coral reefs and seagrass meadows, exhibiting unique adaptations, including using their large pectoral and pelvic fins to propel themselves across reefs at low tide—a movement that resembles walking. This behavior provides them with a unique advantage, allowing the species to hunt in tidepools and shallow areas that are inaccessible to competing predators. The sharks’ dependence on shallow nearshore habitats makes them highly vulnerable to threats such as fishing, tourism, and coastal development. In addition, their small range increases their risk from habitat destruction and the impacts of climate change. A lack of knowledge about the species and its habitats also hampers conservation efforts.

Edy Setyawan will investigate the life history, population status, habitat preferences, and movement patterns of Raja Ampat epaulette sharks to help determine conservation priorities and guide better management plans for the species. He will conduct field surveys and population and movement analyses using a combination of approaches, including photographic identification, radio frequency identification, acoustic telemetry, and biologging. Dr. Setyawan will use this information to make recommendations to strengthen conservation of the species.

To learn more about Dr. Setyawan, read his bio.

See the full list of 2025 Pew marine fellows.