Orcas covered in scars left by ‘cookiecutter sharks’ may be new population, study says
A killer whale leaps out of the water when swimming—a behaviour known as porpoising. Credit: Minette Layne/Wikipedia/CC A group of killer whales spotted hunting off the coast of California and Oregon over two decades may actually be their own unique population of animals, a new study says. When the notorious black fin of an orca