For the first time ever, researchers have tracked the complete migration cycle of an Australian southern right whale in detail, following it over 6,000 km from near Albany in Western Australia to Antarctica and back again – and, remarkably, along sections of its migration it followed the exact same route.

Marine science experts have warned that record-high ocean temperatures, combined with a strong El Niño forecast to develop this year, are set to trigger intense marine heatwaves around the globe.

New research has revealed the depths warm water-loving reef sharks will go in their search for food, after an international team of scientists tracked silvertip sharks diving as far as 750m below the ocean’s surface.