VIDEO: Chum salmon attacking GoPro camera

Chum salmon, also known as dog salmon, have the widest natural geographic distribution of all the Pacific salmon, and are widespread throughout Alaska. Chum spend most of their lives feeding in saltwater, only to return to fresh water once they mature, some traveling almost 2,000 miles upstream in their return to home waters. Back in fresh water, adult chum salmon turn from their bright silver ocean-going selves to a dark olive brown. They develop a hooked snout and large, canine-like teeth, and are apparently feisty around GoPro cameras.