Add Yahoo as a preferred source to see more of our stories on Google. Researchers discovered that Northern resident killer whales hunt by going silent and eavesdropping on dolphin echolocation to ...

Picture a dolphin diving toward the seafloor with something odd on its nose. It is not a shell or a fish. It is a sea sponge.

Dolphins also have a habit of flinging octopuses. This has a practical benefit of killing the octopus before the dolphin tries to eat it, thus avoiding the danger of being choked by hundreds of ...