BBNJ Agreement

Also called: High Seas Treaty · Topic: Oceans: Hydrological Cycle, Relief of the Ocean Floor, Temperature and Salinity · NCERT: Beyond NCERT

Meaning

The BBNJ Agreement (also called the High Seas Treaty) is a global agreement under UNCLOS (UN Convention on the Law of the Sea). It protects and manages sea life in the high seas, the open ocean that lies outside every country's control. It was adopted in June 2023 and came into force on 17 January 2026 [1][2].

It matters because, for the first time, there are shared rules for over two-thirds of the ocean's surface. This area holds over 90% of Earth's habitat by volume [2].

Explanation

What "BBNJ" means and why it was needed

• Full name: the Agreement under UNCLOS on the Conservation and Sustainable Use of Marine Biological Diversity of Areas Beyond National Jurisdiction. "Biological diversity" means the variety of living things.
• High seas: the ocean outside every country's EEZ (Exclusive Economic Zone). An EEZ is the belt of sea up to 200 nautical miles from a country's coast, where that country controls the fish, oil and other resources.
• The problem before BBNJ: a "tragedy of the commons"
• Nobody owns the high seas.
• So nobody felt responsible for protecting them.

• Fish stocks and sea life were overused, and there was no clear way to set up protected areas.

• Stresses the treaty must deal with: overfishing, plastic pollution, ocean acidification, deoxygenation (loss of oxygen in the water) and marine heatwaves (long spells of unusually warm sea water).

Timeline: from talks to entry into force

• Talks: nearly two decades of negotiation [1].
• Adopted: June 2023 [1].
• Ratification mark crossed: the treaty needed 60 ratifications. Ratifying means a country formally agrees to be legally bound. Morocco and Sierra Leone became the 60th and 61st parties in September 2025 [1].
• Entry into force: 17 January 2026. By then 81 countries had ratified it [2].
• Next step: the first Conference of the Parties (COP), the meeting of all member countries, must be held within one year of entry into force, that is, by January 2027 [2].

The four pillars

Pillar	What it does
Marine protected areas (MPAs)	Countries can set up protected areas in the high seas. These areas are needed to reach the 30x30 target: protecting 30% of land and sea by 2030, under the Kunming-Montreal Global Biodiversity Framework.
Environmental impact assessments (EIAs)	Before an activity on the high seas begins, it must be checked for possible harm to the ocean.
Marine genetic resources (MGRs)	Genes from deep-sea plants, animals and microbes can be used in products such as medicines. The benefits must be shared fairly among countries.
Capacity-building and technology transfer	Poorer countries get help with training and tools so they can take part in ocean science and decisions.

Who is in, and who is not

• Have ratified: major economies such as China, Japan, France and Brazil [1].
• USA: signed in 2023 but has not ratified [1].
• India:
• Signed in 2024 [2].
• Ratification depends on India first passing its own law. It had not been completed when the treaty came into force [2].

Where it occurs

• Area covered: all ocean areas beyond national jurisdiction, meaning outside every country's EEZ (beyond 200 nautical miles from the coast). This is over two-thirds of the ocean's surface [2].
• Legal home: it is an implementing agreement under UNCLOS. It works within the existing law of the sea and does not replace it.
• Who runs it: the Conference of the Parties (COP) of the countries that have ratified it. The first COP must meet by January 2027 [2].
• Year: adopted 2023; in force since 17 January 2026 [1][2].
• Indian angle:
• India has signed the treaty (2024) but has not yet ratified it [2].
• India also wants to explore the deep sea through the Deep Ocean Mission (2021), run by the Ministry of Earth Sciences (MoES) [5]. Under this mission, Samudrayaan will take three people to 6,000 m depth in Matsya-6000 [3][4]. India's ratification therefore has to balance ocean protection with these deep-sea interests.

Don't confuse with

• UNCLOS: the parent convention, the overall "constitution" of the sea that sets up zones such as the EEZ. BBNJ is a newer agreement under UNCLOS that deals only with sea life in areas beyond national jurisdiction.
• EEZ (Exclusive Economic Zone): the sea up to 200 nautical miles from the coast, where one country controls resources. BBNJ covers the area outside all EEZs.
• International Seabed Authority (ISA) mining code: the ISA is a body under UNCLOS, based in Kingston, Jamaica. It is still writing the rules for deep-sea mining of minerals such as polymetallic nodules (lumps of metal-rich rock on the seabed). BBNJ is about living things (biodiversity and genetic resources), not minerals.
• Global plastics treaty: this treaty is still not agreed. The INC-5.2 talks in Geneva ended on 15 August 2025 without a treaty text [7]. BBNJ is already in force (17 January 2026) [2].

Prelims Hooks

• BBNJ timeline: adopted June 2023, then the 60-ratification mark was crossed in September 2025, then it came into force on 17 January 2026 [1][2].
• 60th and 61st parties: Morocco and Sierra Leone (September 2025) [1]. When the treaty came into force, 81 countries had ratified it [2].
• Coverage: over two-thirds of the ocean's surface, which is over 90% of Earth's habitat by volume [2]. Trap: it covers areas beyond EEZs, not territorial waters or EEZs.
• Four pillars: MPAs, EIAs, marine genetic resources (fair benefit-sharing), and capacity-building with technology transfer. Trap: deep-sea mineral mining rules are made by the ISA, not by BBNJ.
• Status of key countries: USA signed in 2023 but has not ratified [1]. India signed in 2024, and its ratification is pending until it passes its own law [2]. China, Japan, France and Brazil have ratified [1].
• First COP: must meet within one year of entry into force, that is, by January 2027 [2].

Mains Points

• Closing the high-seas governance gap (GS-III, Environment):
• Over two-thirds of the ocean belongs to no country. This led to a "tragedy of the commons": overfishing, plastic dumping and no protected areas.
• BBNJ's MPAs, EIAs and fair sharing of marine genetic resources [2] give the high seas their first common rules.

• High-seas MPAs are needed to reach the 30x30 target under the Kunming-Montreal Global Biodiversity Framework.

• Protecting oceans that face several stresses at once:

• Heat (marine heatwaves), acidification and deoxygenation together push coral reefs and fisheries towards collapse.
• More than 40% of the surface ocean had already crossed the acidification boundary by 2020 [6].

• High-seas MPAs and EIAs can reduce extra human pressure, so marine ecosystems are better able to cope with these stresses.

• India's choices:

• India should complete its ratification, which needs a domestic law [2]. This would give it a voice at the first COP and a share of marine genetic resource benefits.
• It must also balance BBNJ protection against its deep-sea goals: the ISA mining code, the Deep Ocean Mission and the Blue Economy (using ocean resources for growth) [5].
• BBNJ's capacity-building pillar can help India and other developing countries build their ocean science.

Related concepts

• Ocean acidification
• Ocean deoxygenation
• Marine heatwave
• Microplastics
• Great Pacific Garbage Patch
• Atlantic Meridional Overturning Circulation

Read more

• Oceans and life, oceans under stress, and the High Seas Treaty