Scientists discover 1st animal that doesn't breathe oxygen

Scientists have discovered something they didn't think existed: an animal that can't breathe oxygen, and obviously doesn't need to. That animal is a parasite called Henneguya salminocola, distantly related to jellyfish. It lives in the muscles of salmon and trout, causing unsightly little white nodules known as "tapioca disease."
Read more: https://www.cbc.ca/news/technology/animal-breathe-oxygen-1.5478645?source=Snapzu