A sperm whale was recently seen swimming in a shallow estuary in Ireland — a rare occurrence that worried conservationists. Fortunately, the large creature “lived to tell the tale.” ...

in a “rare” sighting, a sperm whale was observed swimming into the mouth of a river in Ireland. Just a few dozen sperm whale sightings have been made off the coast of Ireland since 1990 ...

Often called the ‘unicorns of the sea,’ narwhals use echolocation to navigate and hunt in the icy Arctic waters. These whales emit directional clicks that can travel long distances, bouncing off fish ...

A rare pygmy killer whale was saved by rescuers after becoming stranded in Guyana, photos show. Photo from the University of Guyana A young pygmy killer whale — a rare type of dolphin — was ...