A pygmy blue whale, Balaenoptera musculus brevicauda, swims in the Banda Sea, Indonesia. This huge cetacean reaches up to 24 meters in length and makes up to about half of all blue whales alive.© ...

Humpback whales (Megaptera novaeangliae) like the ones pictured here with bottlenose dolphins (Tursiops truncatus) in Kona, Hawaii, appear to be more open to interacting with fellow cetaceans.

Blue whales making an unusual winter appearance. Humpacks sticking around for months, a pair lunging out of the water in sync with one another in a video making a virtual splash. And thousands of ...

The New England Aquarium's survey team spots endangered blue whales in southern New England, marking the first documentation in the area.

Here you can spot gray, blue and humpback whales, dolphin pods, sea lions and sharks while enjoying a luxurious beachside ...

What researchers spotted off Cape Cod and the Vineyard recently is something they almost never see in these waters.

Blue whales making an unusual winter appearance. Humpbacks sticking around for months, a pair lunging out of the water in sync with one another in a video making a virtual splash. And thousands of ...