In the icy waters surrounding Antarctica, small shrimp-like crustaceans called krill (Euphausia superba) swim in swarms of trillions, forming a biomass larger than the entire

Orcas, or killer whales, are the apex predator in the ocean when they work together. A new study documents how a pod of orcas is

Surangel S. Whipps Jr., president of the tiny Pacific island nation of Palau, wants more countries to join him in calling for a moratorium on

Swimming with giant manta rays (Mobula birostris) feels like an underwater dance. Their slow, rhythmic movements are astonishing to Madalena Pereira Cabral. She describes her

July is the peak of melt season in the Arctic. The sun is high and shines for almost 24 hours a day. Air and water

Plastic trash has become one of the most visible global environmental crises of our time. Single-use plastics make up nearly half of all plastics produced,

Brazilian oceanographer Leticia Carvalho has been named the next secretary-general of the International Seabed Authority (ISA) after winning an election that could change the course

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For Leticia Carvalho, change is needed at the International Seabed Authority, the regulator of deep-sea mining in international waters. Carvalho, 50, a Brazilian oceanographer and