Tuna are essential for a healthy ocean ecosystem. Being an apex predator at the top of the food chain, tuna are a significant part of the ocean nutrient pump transporting nutrients to the sea surface ...

The poisonous element is released by mining and burning coal and ends up in the ocean, where it builds up in fish. Levels have fallen dramatically in the atmosphere - but remained stable in tuna ...

A huge marine reserve in the Pacific Ocean has led to the recovery of tuna and other migratory fish around its borders, according to a study. The Papahānaumokuākea Marine National Monument in ...