Although humpbacks migrate between their polar feeding grounds and the warmer waters where they breed, the exact routes they take have remained a mystery. By studying the types of scars on humpback whales and how recently they were made, researchers from the University of Pretoria’s Mammal Research Institute can now determine routes the whales took before arriving in their breeding grounds off the west coast of South Africa, Namibia and Gabon.

In a world-first, the public is getting the opportunity to assist monitoring shark movements off the Western Australia coast in a bid to reduce the number of attacks. The Department of Fisheries has updated its Sharksmart website, which will digitally map all reported shark sightings from the public, surf lifesavers and other agencies.” We want to give beachgoers the latest information so they can make informed decisions about their water use," said Lisa Clack, manager of the department's shark response unit.

Already at risk from oil spills, hunting and habitat destruction, sea turtles have another obstacle to contend with: decompression sickness, also known as the bends. Scientists claim the sickness has been diagnosed for the first time in loggerhead sea turtles, with individuals accidentally caught in fishing nets most likely to suffer.

Gabon has declared nearly a quarter of its territorial sea off-limits to commercial fishing. The central African nation is home to a variety of threatened species including great hammerhead sharks, manta rays and whale sharks.