Old Thom has been spotted again. A lone killer whale was seen this weekend in a rare orca sighting off the coast of Massachusetts. Donna Piraino was fishing for tuna Sunday afternoon in the Stellwagen ...

A team of marine biologists are investigating the mysterious mass stranding of orcas in Argentina, after 26 killer whales were found on the beach with no signs of injury or trauma. Specialists at the ...

Sharks are usually the hunters, but these killer whales have developed a surprising new way to enjoy a meal. In A Nutshell ...

A study reveals that certain West Coast orcas belong to distinct social groups with different habits and diets. NPR's Scott Simon speaks with ecologist Josh McInnes about how the groups differ.

Wildlife officials were taking a big swing at helping a young humpback whale stranded on an Oregon Coast beach get back to sea the morning of Nov. 17.

Fishing crews across a broad expanse of the world’s oceans, ranging from the South Atlantic to the North Pacific, report ...