Home About FAQ Ocean 101 Leadership Privacy policy Terms of use
Contact Us
Ask AI

Discover

Disclaimer: Ocean Central’s chatbot is an AI-powered tool that generates responses based on publicly available information from credible sources such as IPCC reports, peer-reviewed research by Professor Carlos Duarte, and a leading oceanography textbook. It may also search the web for additional content while filtering out known low-quality sources. Please note that all responses are automatically generated and may include factual or contextual inaccuracies. These responses do not represent the views or opinions of Wave and should not be interpreted as professional or scientific advice. Wave accepts no responsibility or liability for any actions, decisions, or outcomes resulting from the use of this tool.

Browse Methodology

We value your privacy

We use cookies to improve Ocean Central’s site. Some cookies are necessary for our website to function properly. Other cookies are optional and help personalize your experience. You can consent to all cookies or required cookies only. You can change your preferences at any time. To learn more, view our Cookie Policy.

Protect Marine Life - Mammals - Ocean Central

Overview Insights Act

Many marine mammals were once driven to the brink of extinction by commercial whaling and hunting, but global bans and protections introduced in the mid-20th century have enabled recoveries in species such as humpback whales and certain seals. 

Today, some species are rebounding, while others still face serious threats from entanglement, ship strikes, habitat loss, and climate change. Overall, there is progress in some areas and a need for expanded conservation efforts.

The IUCN Red List tracks the conservation status of assessed species, while the Ocean Biodiversity Information System (OBIS) provides open data on the distribution of marine species worldwide. Together, these resources help us monitor trends, identify hotspots of biodiversity, and guide action to protect and restore ocean life.

Key Stats

  • 253

    Marine mammals tracked on the IUCN Red List

  • 31%

    Marine mammals showing decreasing population trends

  • 44%

    Marine mammals with insufficient data for assessment

Species at Risk of Extinction
Map:

Globally, 17% of IUCN-assessed marine mammal species are at a high risk of extinction.

Globally, 17% of IUCN-assessed marine mammal species are at a high risk of extinction.

Mammals Data Score
  • Data Quality (# of species)
    • 0- Insufficient
    • 0- Expired
    • 359- Stale
    • 314- Recent
    • 12- Suficient
  • Geographic Range
    99.10 of global data available
  • Global Goal(s)
    2030 Goal – High Quality
  • 2030 Goal – High Quality
Data Availability

​​There is still so much we do not know about our oceans.

Join us in filling critical gaps in ocean data.

Marine mammals play diverse roles in maintaining ocean health. From whales and dolphins to seals and manatees, mammals help sustain the balance, resilience, and productivity of marine ecosystems, making them crucial to ocean biodiversity.

As ecosystem engineers, marine mammals move nutrients, shape food webs, and even enhance ocean productivity through processes like the “whale pump,” which recycles nutrients that fuel plankton growth. Their lifecycles also contribute to carbon capture, linking marine health directly to climate stability. Some populations (e.g., several humpbacks) are recovering under strong protections, while others still face entanglement, ship strikes, noise, and habitat loss.

Populations are slowly recovering in some regions, but incomplete data and limited long-term monitoring make it difficult to track global trends. Expanding population studies and improving threat mapping are essential to protect these species and sustain the ocean services they provide.

Each successful recovery, from humpback whales in the Pacific to monk seals in the Mediterranean, demonstrates that conservation works when protections are enforced and communities are involved.

Marine Mammal Populations

Track how marine mammal populations are changing over time to understand the current health of ocean ecosystems and the impact of conservation efforts.

Population Trends
Map:

Globally, 26% of marine mammals are increasing or stable.

Threats and Risk

Explore the main threats driving marine mammals’ decline and see how species are classified by risk level to help prioritize protection and recovery efforts.

Greatest Threats
Map:

Globally, the largest threats to all marine mammal species are pollution, natural system modification, and residential and commercial development.

Risk Level
Map:

Globally, of the 44 marine mammal species at a high risk of extinction, 36 species are only classified as endangered, meaning there’s still a strong chance for recovery with timely action.

Species Threat Trend
Atlantic Dolphin Endangered Decreasing
Atlantic Hump-backed Dolphin Critically Endangered Decreasing
Australian Sealion Endangered Decreasing
Bahaman Hutia Critically Endangered Decreasing
Barred Bandicoot Endangered Decreasing
Black Right Whale Critically Endangered Decreasing
Blind River Dolphin Endangered Unknown
Canarian Shrew Endangered Decreasing
Crab-eating Macaque Endangered Decreasing
De Winton's Golden Mole Critically Endangered Unknown
False Canyon Mouse Critically Endangered Decreasing
Finless Porpoise Endangered Decreasing
Galapagos Islands Fur Seal Endangered Decreasing
Galapagos Sea Lion Endangered Decreasing
Ganges Dolphin Endangered Decreasing
Giant Brazilian Otter Endangered Decreasing
Gulf of California Harbour Porpoise Critically Endangered Decreasing
Gulf of Mexico Whale Critically Endangered Decreasing
Ha'tsviha'Israeli Endangered Decreasing
Hairy-nosed Otter Endangered Decreasing
Hawaiian Monk Seal Endangered Decreasing
Hector's Dolphin Endangered Decreasing
Hooker's Sealion Endangered Decreasing
Huillin Endangered Decreasing
Indian Ocean Humpback Dolphin Endangered Decreasing
Irrawaddy Dolphin Endangered Decreasing
Malenge Babirusa Endangered Decreasing
North Pacific Right Whale Endangered Unknown
Nubian Ibex Endangered Decreasing
Pere David's Deer Extinct in the Wild nan
Perrin's Beaked Whale Endangered Decreasing
Pribilof Island Shrew Endangered Unknown
Ryukyu Rabbit Endangered Decreasing
Salt-marsh Harvest Mouse Endangered Decreasing
Sea Cat Endangered Decreasing
Sea Otter Endangered Decreasing
Solomons Mastiff Bat Endangered Decreasing
Southern Tuco-tuco Endangered Decreasing
Tehuantepec Hare Endangered Decreasing
Tiger Endangered Decreasing
Tuco-tuco of the Dunes Endangered Decreasing
Van Zyl's Golden Mole Endangered Unknown
Western Gerbil Endangered Decreasing
Ship strikes

Globally, there has been a decline of ship strike reports since a peak of 44 in 2007.

Protecting marine mammals requires coordinated efforts across policy, conservation, and community action. By reducing pressures and supporting ecosystem recovery, we can help species rebound and strengthen ocean resilience.

Taking Action

  • Strengthen Marine Protection

    Establishing and enforcing additional marine protected areas safeguards critical habitats, including feeding and breeding grounds, from harmful activities such as fishing, tourism, and industrial development.

  • Enforce Global Bans

    The global community must work together to ensure the effective enforcement of bans on commercial whaling and illegal hunting of marine mammals. It is essential to strengthen penalties for non-compliance and provide robust support for international agreements, such as the International Whaling Commission, to protect these vulnerable species and preserve the health of our oceans for future generations.

  • Promote Sustainable Fishing

    The adoption of whale- and dolphin-safe fishing gear is essential to reducing the risk of entanglement in nets and ropes. Supporting innovations like bycatch reduction devices, such as acoustic deterrents and escape panels, can minimize the accidental capture of non-target species. These measures help protect marine life and promote more sustainable fishing practices.

  • Reduce Noise Pollution

    To mitigate the effects of underwater noise on marine mammals, strict regulations should be enforced to limit noise from ships, offshore drilling, and other industrial activities. Encouraging the use of quieter engines and advanced noise-reducing technologies can further minimize the disruption to marine mammal communication and navigation, safeguarding their health and well-being.

  • Raise Public Awareness

    Raising awareness about the threats faced by marine mammals and the importance of their conservation is crucial. This can be achieved through public education campaigns and promoting ecotourism initiatives. 

  • Involve Communities

    Engaging local communities and Indigenous groups in conservation efforts and offering alternative livelihoods to hunting or fishing practices that pose risks to marine mammals fosters a deeper understanding of conservation and provides sustainable solutions for local populations.
Loading...

Case Studies 2

  • South Pacific Ocean

    Recovery of Humpback Whales in the South Pacific

    Once nearly wiped out by industrial whaling, South Pacific humpback whale populations have shown significant recovery since the 1960s, when global bans and regional protections were introduced. A comprehensive assessment of humpback whales in Oceania — spanning the South Pacific from eastern Australia to French Polynesia — indicates that the population once exceeded 14,000 individuals, but was reduced to well below 1% of that level by the mid-1960s. Since then, numbers have increased to several thousand animals, representing a substantial rebound from near-extirpation.

    The majority of humpback whale populations worldwide are now recovering, and Southern Hemisphere stocks — including those using South Pacific breeding grounds — are estimated by the International Whaling Commission to be at around 70% of pre-whaling levels overall.

    This recovery illustrates how international cooperation, strong legal frameworks, and long-term conservation measures can reverse even severe biodiversity loss. Success stems from a powerful mix of global treaties, coordinated science-based management, and local stewardship. The rebound of humpback whales has delivered ecosystem and economic co-benefits, from improved marine food web functioning to the growth of sustainable whale-watching industries across the Pacific.

    The recovery directly supports the 2030 goal to halt marine species extinction and the 2050 goal to restore abundance, proving that when we commit to protection, marine life rebounds.

     

    Key Actors: International Whaling Commission (IWC), South Pacific Regional Environment Programme (SPREP), local governments, local communities and whale-watching associations.
    iwc.int iwc.int www.sprep.org
  • Eastern and Central Mediterranean

    Recovery of the Mediterranean Monk Seal

    Once considered one of the world’s most endangered marine mammals, the Mediterranean monk seal (Monachus monachus) is making a steady comeback after near extinction in the 1980s, when populations had fallen below 250 individuals across the region.

    Since the early 1990s, large-scale recovery efforts have combined marine protected area creation, anti-poaching laws, coastal habitat restoration, and rehabilitation centers for orphaned pups. The LIFE–Monachus and other EU-supported projects helped establish monitoring, research, and rapid-response networks across Greek islands and coastal Turkey.

    Today, over 700 monk seals are estimated to inhabit the Mediterranean, with healthy breeding groups in the Aegean and Ionian Seas. Rehabilitation programs led by MOm and WWF Greece have rescued and reintroduced dozens of seals, while awareness campaigns have fostered coexistence with coastal fishers.

    This recovery demonstrates how community engagement, science-based care, and long-term protection can bring a species back from the brink — showing that conservation can work when partnerships endure.

    Key Actors: MOm/Hellenic Society for the Study and Protection of the Monk Seal, WWF Greece, Greek Ministry of Environment & Energy, UNEP/MAP–RAC/SPA, European Commission LIFE Programme
    www.mom.gr

Data Layers

No active data to display.
View relevant data layers on the globe using the available map toggle in the top right of each card in the left panel.
Note: Loading high-resolution datasets may take up to a minute.
Use the toggle buttons in the sidebar modules to display new active data layers on the globe.

Data Layers

No active data to display.
View relevant data layers on the globe using the available map toggle in the top right of each card in the left panel.
Note: Loading high-resolution datasets may take up to a minute.
Use the toggle buttons in the sidebar modules to display new active data layers on the globe.

Data Layers

No active data to display.
View relevant data layers on the globe using the available map toggle in the top right of each card in the left panel.
Note: Loading high-resolution datasets may take up to a minute.
Use the toggle buttons in the sidebar modules to display new active data layers on the globe.