Thresher Shark Indonesia

Thresher Shark Indonesia was founded in 2018. Our work aims to protect endangered pelagic thresher shark (Alopias pelagicus) in Alor Island, Indonesia through investigating the critical habitat, socio-economic importance of the species for the community and conservation outreach to local schools. We combine research and community engagement to inform policy decision for local protection of the species

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On The News

Read more about our latest work; from tagging the first thresher shark with a satellite tag, visiting local schools to tell thresher shark storybook to meeting with Regent Government of Alor.

The Mounting of Internal Acoustic Tag on Thresher Sharks, the First One in Indonesia and the World

On September 25th 2020 –  Oktober 10th 2020, Thresher Shark Indonesia, with the support of Ocean Blue Tree, through the Samambaia Liveaboard expedition, Thrive Conservation, and Underwater Tribe mounted the MiniPAT satellite and Internal Acoustic Tag on Thresher Sharks as well as receivers around Alor, Nusa Tenggara Timur.  Research on thresher shark (Alopias pelagicus) using…

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Alor’s Head of Regent, Amon Djobo Made the Thresher Shark Indonesia Program Plan Official

Alor – Head of Regent, Amon Djobo directly made official the Launch of Work Program of Thresher Shark Indonesia 2020 – 2021 on Tuesday, (22/09) in Alor regent’s office. This inauguration was also attended by the Head of Offices of Alor, high-ranked individuals, as well as marine entrepreneurs around Alor, East Nusa Tenggara. This event…

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Thresher Shark Indonesia: Full Support from the Alor Government

Thresher Shark is one of the shark species that is now included in the IUCN (International Union for Conservation of Nature) red list. Even though it is listed as a circum global animal, or could be found almost around the world, the consistent existence of thresher sharks can only be found in diving activities in…

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My population keeps declining. Help me survive in the wild


Continues population declines for the past 10 years


As bycatch in industrial tuna fisheries

±US$ 13 M

Annual revenues from tourism activities

Sources: Report, Indonesian Ministry of Marine and Fisheries (2016) and Cruz, C (2016)

Thresher Shark (Hiu Tikus) Alopias pelagicus

Pelagic Thresher shark (Alopias pelagicus) has just risen from "Vulnerable (VU)" to "Endangered (EN)" from the International Union for Conservation of Nature (IUCN) red list of threatened species. Although International Concern is rising, their species still largely understudied with no conservation priority sites, no critical habitat identified, and no education and outreach. Their population primarily depleted due to bycatch and targeted fisheries, both large and small scale. Their biological characteristics as slow-growing, slow mature animals, put them at a high risk of extinction.

Although Thresher shark is listed as Appendix II in Convention on International Trade in Endangered Wild Fauna and Flora - protection at the local level do not yet implemented due to socio-economic importance of the species for several local communities in Indonesia


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