A new report published by The Royal Society looks at the reasons behind how modern day whales evolved to be so much bigger than their ancestors.
A newborn Commerson's dolphin calf has died at SeaWorld's Aquatica water park in Orlando just minutes after being born.
The recently released Japanese “Red List of Marine Creatures” has been criticized by some experts for the lack of protection it provides for whales and dolphins.
The Japanese Fisheries Agency and Ministry of the Environment compile the list, which is Japan’s own version of the International Union for Conservation of Nature’s (IUCN) Red List - the world's most comprehensive inventory of the global conservation status of different species.
Congressman Matt Gaetz, a Republican representative from Florida, has put forward a resolution in the US House of Representatives calling for an end to Japanese whaling.
In a speech last month he praised Australia for the stance it had taken on the issue and said it was time for the US to now act. He highlighted the issue of Japan hunting whales in Antarctica for commercial purposes under the guise of scientific whaling.
Mr Gaetz wants to see the issue discussed as part of trade negotiations with Japan and will raise it with President Trump as soon as possible.
According to reports from Japan, two new species have been added to the list of those already allowed to be killed, and captured by fishermen in Taiji for use in captivity shows.
Whales and dolphins will no longer be able to be held in captivity at the Vancouver Aquarium after the city's Park Board agreed on Monday to ban bringing in new cetaceans. The ban includes injured or rescued whales and dolphins.
Drone footage taken by researchers from WWF studying narwhals in north-eastern Canada has revealed how the whales use their unique tusks to hunt for fish.
Scientists in South Africa have been examining the bodies of three great white sharks that have washed up off the coast of Gansbaai on the western Cape.
The sharks, up to 5m long, had their oil-rich livers missing, with the most likely explanation that they were probably preyed on by orcas.