The great white shark is the largest predatory fish in the ocean and an apex predator whose presence helps regulate the structure of coastal and pelagic marine ecosystems. Slow-growing, late-maturing, and naturally rare, the species is unusually sensitive to fishing pressure, and long-term abundance data indicate substantial historical declines across its range [Rigby et al. 2022]. This profile examines the biology that makes white sharks ecologically significant, the pressures that threaten them, and the international and national measures now in place to support their recovery.
Biology and Identification
The great white is a large, robust mackerel shark with a conical snout, large triangular serrated teeth, and a crescent-shaped (lunate) caudal fin. Coloration is countershaded — slate-grey to bluish above and white below — an arrangement that reduces visibility to both prey and observers. Adults commonly reach lengths well in excess of 5 m, and the largest reliably measured individuals approach 6 m; females grow larger than males [Rigby et al. 2022; NOAA 2024a].
White sharks are regionally endothermic. Using a counter-current heat-exchange network (the rete mirabile), they retain metabolic heat and maintain core muscle, stomach, brain, and eye temperatures above that of the surrounding water, supporting sustained activity in cold seas [NOAA 2024a]. The species is long-lived and late-maturing: males mature at roughly 26 years and females at roughly 33 years, and individuals may live 70 years or more — radiocarbon age validation of Northwest Atlantic specimens estimated the oldest male at about 73 years [NOAA 2024a; Hamady et al. 2014]. This slow life history — late maturity combined with low reproductive output — limits the rate at which depleted populations can rebuild.
Diet shifts with age. Juveniles feed largely on bony fishes, smaller sharks, and rays, while larger adults take pinnipeds such as seals and sea lions, along with cetaceans and scavenged whale carcasses [NOAA 2024a]. As an apex predator, the white shark exerts top-down influence on prey populations and, indirectly, on the wider food web.
Habitat and Range
The great white shark occurs worldwide in temperate and subtropical coastal and offshore waters, with concentrations off parts of North America, southern Africa, Australia, New Zealand, and the Mediterranean region [Rigby et al. 2022]. In U.S. waters the species ranges from Maine through the Gulf of Mexico in the Atlantic and from Alaska to California, including waters off Hawaii, in the Pacific [NOAA 2024a]. Individuals undertake long-distance migrations between coastal aggregation areas and open-ocean habitat, and the species occupies a wide depth range from the surface to several hundred metres.
In accordance with NRWL sensitive-species policy, specific site locations, aggregation areas, and seasonal movement details are not disclosed in this article.
Conservation Status
The great white shark is listed as Vulnerable on the IUCN Red List (assessment e.T3855A212629880, amended 2022 version of the 2019 assessment) under criteria reflecting an estimated population reduction of approximately 30–49% over three generations [Rigby et al. 2022]. The species is included on CITES Appendix II, requiring that international trade be regulated through permits and accompanied by findings that exports are legal and not detrimental to wild populations; it was added to Appendix II in 2004 [CITES 2023]. It is additionally listed on Appendices I and II of the Convention on the Conservation of Migratory Species (CMS), where it was added in 2002 to promote coordinated conservation among range states [CMS 2002].
National protections supplement the international listing. In the United States the white shark is a prohibited species in all federal fisheries, meaning retention is not allowed, although a 2012 status review concluded that listing under the U.S. Endangered Species Act was not warranted at that time [NOAA 2024a]. Australia lists the white shark as vulnerable and migratory under its national environmental legislation and maintains a national recovery plan [DCCEEW 2024]. The Mediterranean subpopulation has been assessed separately as Critically Endangered, reflecting much steeper regional declines than the global figure conveys [Rigby et al. 2022].
Threats
Fisheries bycatch is a leading pressure. White sharks are incidentally captured in commercial and recreational gear including longlines, gillnets, and trawls, and post-release survival is not assured for all captured animals [Rigby et al. 2022; NOAA 2024a].
Historical and illegal targeted exploitation has contributed to declines. Demand for jaws, teeth, and fins has driven targeted catch in some regions, and trophy and curio trade persists despite the CITES listing [Rigby et al. 2022].
Slow population recovery is an intrinsic vulnerability rather than an external threat, but it compounds every other pressure: because the species matures late and reproduces slowly, even moderate added mortality can outpace replacement [Rigby et al. 2022].
Prey availability and habitat degradation also influence white shark populations. Declines in pinniped or fish prey, coastal habitat alteration, and pollution can reduce local carrying capacity [NOAA 2024a].
What Is Being Done
International trade regulation. The CITES Appendix II listing obliges exporting countries to issue non-detriment findings and permits before white shark products may be traded internationally, creating a documentary framework intended to curb unsustainable and illegal trade [CITES 2023].
National prohibitions and management. Several range states, including Australia, South Africa, New Zealand, and the United States, afford the species legal protection. In U.S. waters the white shark is a prohibited species across federal fisheries [NOAA 2024a].
Bycatch reduction and monitoring. Fisheries management measures — gear modifications, spatial and temporal restrictions, and mandatory reporting — aim to reduce incidental capture, while satellite and acoustic tagging programs build the movement and population data needed for assessment [NOAA 2024a].
Population assessment. The IUCN Red List assessment synthesizes long-term abundance indices and catch data to track trends and guide priorities, and identifies regional subpopulations, such as the Mediterranean, that require focused attention [Rigby et al. 2022].
How Readers Can Help
Citizen science. Report shark sightings and tag-recovery information to recognized research and monitoring programs. Verified observations strengthen the abundance and distribution datasets used in formal assessments.
Support sustainable seafood. Choose seafood certified by credible sustainability programs, which reduces demand for fishing practices associated with high shark bycatch [NOAA 2024a].
Avoid shark-derived products. Do not purchase jaws, teeth, fins, or curios derived from white sharks; such trade is regulated under CITES Appendix II and sustains targeted exploitation [CITES 2023].
Education outreach. Share accurate, science-based information about the ecological role of apex marine predators. Reducing public fear and misperception supports the political will needed for protective management [NOAA 2024a].
References
[CITES 2023] CITES. (2023). Appendices I, II and III. Convention on International Trade in Endangered Species of Wild Fauna and Flora. Carcharodon carcharias listed on Appendix II (2004). https://cites.org/eng/app/appendices.php
[CMS 2002] Convention on the Conservation of Migratory Species of Wild Animals. Carcharodon carcharias — species page (listed on CMS Appendices I and II, 2002). https://www.cms.int/species/carcharodon-carcharias
[DCCEEW 2024] Australian Government Department of Climate Change, Energy, the Environment and Water. White Shark (Carcharodon carcharias) — species profile and recovery plan. https://www.dcceew.gov.au/environment/marine/marine-species/sharks/whiteshark
[Hamady et al. 2014] Hamady, L.L., Natanson, L.J., Skomal, G.B. & Thorrold, S.R. (2014). Vertebral bomb radiocarbon suggests extreme longevity in white sharks. PLOS ONE, 9(1), e84006. https://doi.org/10.1371/journal.pone.0084006
[NOAA 2024a] NOAA Fisheries. (2024). White Shark (Carcharodon carcharias) — Species Directory. National Oceanic and Atmospheric Administration. https://www.fisheries.noaa.gov/species/white-shark
[Rigby et al. 2022] Rigby, C.L., Barreto, R., Carlson, J., Fernando, D., Fordham, S., Francis, M.P., Herman, K., Jabado, R.W., Liu, K.M., Lowe, C.G., Marshall, A., Pacoureau, N., Romanov, E., Sherley, R.B. & Winker, H. (2022). Carcharodon carcharias (amended version of 2019 assessment). The IUCN Red List of Threatened Species 2022: e.T3855A212629880. https://dx.doi.org/10.2305/IUCN.UK.2022-1.RLTS.T3855A212629880.en