No one knows where whale sharks give birth. But a rare encounter with a baby whale shark could help solve one of the oceans' biggest mysteries.
From antelopes to TVs, tiger sharks are far from picky eaters and will even brave hurricanes for a feast. Luckily, their extreme diet has upsides for others too.
Plans for the world's first octopus farm have been abandoned. As the controversial project folds, several nations and US states are banning octopus farming before it even begins.
Some Greenland sharks alive today may have been contemporaries of Shakespeare. With a scarred heart that beats for centuries, this deep-sea shark defies age-related decline.
Humans have more in common with these elite ocean predators than often thought. A little Miles Davis anyone?
In the ocean's twilight zone, where the reach of the Sun fades to nothing, an epic migration begins every time night falls. It could also have an outsized effect on our climate.
The El Niño phenomenon is likely to be particularly intense this year, scientists warn. If so North America may face extreme weather, higher food prices and greater health risks.
In a series of striking photographs, Marcia Riederer captures the elegance and curiosity of the elusive dwarf minke whale.
All-female species have been long thought of as evolutionary dead ends – but one fish has defied the odds to live without males, revealing new clues to how genomes stay healthy.
