Examination of an ancient fossil has given scientists another insight into the evolution of baleen whales such as humpback or blue whales.
Concern for the future of the critically endangered North Atlantic right whale have dramatically increased after six were found dead in recent days in the waters of the Gulf of St. Lawrence, Canada.
SeaWorld is being investigated by two federal agencies in the United States, who are looking at disclosures and public statements made by the company and its executives in or before August 2014, including those concerning the impact of the award-winning documentary, Blackfish.
New research has discovered a third species of toothed whale in which the female members appear to go through a similar condition to the menopause in women, and then survive for many years long after they are no longer able to reproduce.
A rescued harbour porpoise that had been held at the Vancouver Aquarium for nearly nine years, has died.
According to the Aquarium, a necropsy revealed the porpoise had died of pulmonary disease. The death means there are just two cetaceans still held at the Aquarium, a false killer whale and a Pacific white-sided dolphin.
Fishermen from Alaska heading for the Bering Sea are having to cope with pods of orcas feeding on their catch before it can be hauled onboard.
A species of whale that was only identified for the first time in 2003, has now been discovered living in the waters around Sri Lanka.