Introduction

The Stegostoma tigrinum Augmentation and Recovery Project (StAR Project) is a global rewilding inititiative dedicated to restoring populations of the Indo-Pacific leopard shark (Stegostoma tigrinum) across parts of its range where the species has disappeared or declined sharply due to overfishing and habitat degradation.

The species is currently listed as Endangered on the IUCN Red List, underscoring the urgency for coordinated conservation action. Indo-Pacific leopard sharks comprise two distinct subpopulations (Dudgeon et al., 2009) — eastern and western — separated by the Indonesian Throughflow Current, which aligns with the biogeographic boundary known as the Wallace Line.

Following a pivotal 2019 workshop hosted by Georgia Aquarium, the StAR Project was officially launched in 2020. It became the world’s first conservation translocation program for an elasmobranch species, uniting global expertise in captive breeding, genetics, husbandry, and population recovery.

Rewilding Process

The StAR Project integrates ex situ and in situ conservation under the IUCN’s One Plan Approach, and follows the IUCN Species Survival Commission’s guidelines for the use of ex situ management in species recovery. All animals selected for breeding undergo rigorous screening for genetic provenance and reproductive viability to support the long-term health and sustainability of wild populations.

Viable eggs and pups from approved breeding institutions are translocated to in situ facilities, where they are carefully hatched, raised, and monitored by local aquarist teams. Once the sharks reach appropriate size and condition, they are tagged and released into protected natural habitats.

Comprehensive post-release monitoring programs track the movements, survival, and habitat use of reintroduced sharks. These efforts combine satellite and acoustic telemetry with citizen science initiatives, providing critical data to assess adaptation and inform rewilding success.

Outreach and Research

Through local education and outreach programs, the StAR Project actively engages and empowers local communities. Initiatives include internships, school partnerships, nursery tours, and food collection programs, all designed to foster awareness, build local capacity, and cultivate long-term stewardship of shark populations and their habitats.

Long-term research on healthy Indo-Pacific leopard shark populations in regions such as Australia and New Caledonia provides essential insights into the species’ health, behavior, and ecology. Ongoing collaborations with post-graduate researchers examining nutrition, habitat use, and other ecological factors help refine StAR Project methodologies and strengthen conservation outcomes.

What began as a bold idea has evolved into a multi-country collaboration involving aquariums, NGOs, scientists, governments, and local communities. The StAR Project is redefining what is possible for shark conservation and serves as a scalable model for the rewilding of other threatened shark and ray species.

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Global Partners

12

Approved Breeding Institutions

2

Country Projects

StAR Project Indonesia

Launched in 2020, StAR Project Indonesia is the first country-level initiative established under the StAR Project. Focused in the protected waters of Raja Ampat in Southwest Papua, the project aims to re-establish the region’s declining population of Indo-Pacific leopard sharks, part of the species’ eastern subpopulation.

The project is implemented through close collaboration with national and provincial government agencies, NGOs, local communities, and international partners. Two in situ nurseries operate in Raja Ampat: one in the north at the Raja Ampat Research and Conservation Centre (RARCC) on Kri Island, and one in the south at the Misool Foundation nursery on Batbitim and Kalig Islands. These facilities receive eggs from accredited aquarium breeding institutions in the United States and Australia, where pups hatch and are raised by local aquarist teams.

A comprehensive Population Viability Analysis (PVA) (Traylor-Holzer, 2021) was conducted early in the planning phase to evaluate population growth scenarios, release numbers, survival thresholds, and long-term extinction risk, directly informing nursery placement, release strategies, and monitoring design.

To date, more than 60 juvenile leopard sharks have been released into Raja Ampat’s protected waters. Post-release monitoring combines satellite and acoustic telemetry with visual resightings and citizen science to assess survival, movement patterns, habitat use, and long-term adaptation to the wild.

Beyond rewilding, StAR Project Indonesia places strong emphasis on local engagement and capacity building, including nursery internships for Indonesian youth, nursery tours, school partnerships, and education programs such as food-collection initiatives with Raja Ampat schools. These efforts help foster long-term stewardship and ensure conservation success is rooted in community participation.

StAR Project Thailand

Launched in 2024, StAR Project Thailand extends the StAR Project’s rewilding efforts to the Andaman Sea, with the goal of restoring the western subpopulation of Indo-Pacific leopard sharks in the Similan Archipelago and Phang Nga Bay.

An extension of the original Population Viability Analysis (Miller, 2025) was conducted to incorporate this new locality, evaluating population recovery potential, release targets, and long-term viability specific to Thai waters.

Maiton Island, off the coast of Phuket, was designated as the project’s first sea pen facility. The site receives juvenile leopard sharks bred at Aquaria Phuket, where they are raised in human care before undergoing a period of acclimation in the sea pen to prepare them for release into the wild.

To date, 7 juvenile leopard sharks have been successfully released under StAR Project Thailand. Post-release monitoring combines acoustic telemetry with diver observations to assess survival, movements, and habitat use.

Community engagement and citizen science form a core component of the project. Through the Spot the Leopard Shark – Thailand initiative, the team works closely with dive operators, local stakeholders, and the wider public to encourage reporting of leopard shark sightings, supporting post-release monitoring while building awareness and stewardship for the species.

For StAR Project Thailand enquiries, kindly contact:

StAR Project Founders

Steering Committee

  • DR. ERIN MEYER

    2020 - Present
    Co-Chair, StAR Project Steering Committee
    Chief Program Officer, American Humane Society

  • NESHA ICHIDA

    2020 - Present
    Co-Chair, StAR Project Steering Committee
    Project Manager for StAR Project Indonesia, Thrive Conservation

  • ABRAHAM SIANIPAR

    2020 - Present
    Co-Founder and Executive Director, Elasmobranch Institute Indonesia

  • DR. ALISTAIR DOVE

    2020 - Present

  • DR. CAITLIN HADFIELD

    2023 - Present
    Chair, StAR Project Veterinary Working Group
    Director of Animal Health, Seattle Aquarium

  • DR. CHRISTINE DUDGEON

    2020 - Present
    Co-Chair, StAR Project Research Working Group
    Senior Research Fellow, University of the Sunshine Coast & Biopixel Oceans Foundation

  • DAVID APARICI PLAZA

    2025 - Present
    Animal Programmes and Conservation Coordinator, European Association of Zoos and Aquaria (EAZA)

  • LEAH NEAL

    2023 - Present
    Chair, StAR Project Husbandry Working Group

  • DR. MARK ERDMANN

    2020 - Present
    Executive Director of ReShark & Shark Conservation Director, Re:wild

  • MAY METAVEE CHUANGCHAROENDEE

    2024 - Present
    Project Manager for StAR Project Thailand, WildAid

  • MOCHAMAD IQBAL HERWATA

    2020 - Present
    Focal Species Conservation Senior Manager, Konservasi Indonesia

Approved Breeding Institutions

In-Situ Facilities