fertilizer

Whales are more than just majestic creatures—they are essential to maintaining the health of our oceans. A recent study in Nature Communications confirms that whales act as “nutrient transporters,” moving vital elements like nitrogen across vast distances. Their urine, placentas, and sloughing skin create a powerful ocean tonic that fuels marine ecosystems.

As whales migrate between polar feeding grounds and tropical breeding areas, they distribute over 4,000 tonnes of nitrogen annually—more than natural ocean currents provide. This nutrient infusion supports phytoplankton growth, the foundation of the marine food web, which in turn sustains fish populations and coral reefs.

Whales function much like bees pollinating plants, ensuring ocean ecosystems thrive. Known as the “great whale conveyor belt,” this process helps regulate the planet’s circulatory system. Just as trees and phytoplankton absorb carbon dioxide and produce oxygen, whales distribute the nutrients that fuel life beneath the waves.

Pregnant North Pacific humpbacks, for example, gain about 14kg per day in their summer feeding grounds but burn nearly 100kg daily while nursing in tropical waters. As they metabolize their reserves, they release nutrients, enriching the ocean. Fin whales alone produce over 250 gallons of urine per day while feeding, significantly boosting marine productivity.

Decades of commercial whaling have disrupted this vital cycle. Restoring whale populations will strengthen ocean resilience, enhance biodiversity, and combat climate change. Protecting these gentle giants is not just about conservation—it’s about securing a healthier ocean for future generations.