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About This Collection

As a result of a United Nations General Assembly resolution passed in December 2008, World Oceans Day is celebrated on June 8th each year. This annual event spurred the creation of a special collections around our oceans and the efforts being made in conservation ranging from pollution to habitat restoration to fishing and fisheries.

The special collection continues to grow along with Plastic in Our Oceans and 1Water, with a focus on the challenge of providing clean drinking water to the world population.

Curated by mokiethecat

Why do narwhals have horns?
April 09, 2026

Narwhals, often called "unicorns of the sea," are known for their distinctive "horn," which is actually an elongated tooth. Learn more about these fascinating marine mammals in our Marine Life Encyclopedia: oceana.ly/narwhal

Footage is courtesy of O’Corry-Crowe G et al. (2025) Use of tusks by narwhals, Monodon monoceros, in foraging, exploratory, and play behavior. Front. Mar. Sci. 12:1518605. doi: 10.3389/fmars.2025.1518605