A new report suggests that sea otters in the Pacific north-west may have been using tools to unlock their prey from shells long before dolphins in other parts of the world learnt such skills.
Scientists have recorded video footage of a group of True's beaked whales, one the world's most elusive whales, for the first time.
Researchers from Flinders University in Adelaide have confirmed the importance of the Ningaloo reef in north-western Australia as a key habitat for the Australian humpback dolphin, a sub-species of the Indo-Pacific humpback dolphin.
A three-year study discovered 129 dolphins in the research area, with around one dolphin per sq. km, the highest density ever recorded for this species in northern Australia.
WDC is extremely concerned to hear that the authorities in Russia have given the go-ahead for up to 10 orcas to be captured this year from its Pacific region, just two months after it appeared to have been set at zero.
The latest survey to find out how many vaquitas, a type of porpoise only found in the northern part of the Gulf of California, have revealed that there may be as few as just 30 individuals left.
A survey last summer using acoustic techniques to pick up the sounds made by the porpoises discovered just half as many creatures as researchers has estimated to remain just a year earlier.
Theories around why female orcas, like humans, go through the menopause have now been confirmed, after the release of a report detailing years of study led by Prof Darren Croft from the University of Exeter.
Granny was a living legend, famous at home and across the world; a matriarch and guiding light for critically endangered Southern Resident orcas. Researchers knew Granny as J2, the leader of the Southern Resident orca community, but she has been missing for months and now, sadly, the Center for Whale Research (CWR) recently announced that
2017 has begun with the sad news that Granny (J2), an orca thought to be over 100 years old, has died in the last couple of months.