The marine animal had surfaced momentarily to catch a breath when the diver identified it as the perfect opportunity to take ...

What exactly is this unusual blue sea creature? Get to know one of the more unusual members of the sea slug family in our quick look.

Blue whale calves have remained elusive for centuries, with scientists puzzled by their near-total absence from recorded ...

The finding indicates whale songs could serve as a barometer for their overall health, the study said. ‘It is a window into their lives.’ ...

Videos show narwhals using their tusks in several ways, including prodding and flipping a fish. It’s the first reported evidence of the whales playing.