Large factory trawlers indiscriminately scrape and haul up everything from the ocean floor, along with everyone unfortunate enough to get caught in the nets. Roughly one-third of what is dragged in is not profitable fish, but other sea animals, including turtles, whales, dolphins, seals, and seabirds. These beings are referred to by the fishing industry as "by-catch." Severely traumatized and wounded, these animals are subsequently thrown back into the ocean, dead or dying.