Blue whale

The blue whale (Balaenoptera musculus) is a cetacean belonging to the baleen whale suborder Mysticeti. It is the largest known animal to ever exist. They are filter feeders and their diet is almost exclusively krill. Blue whales are currently abundant in all of Earth's oceans, however, it is listed "Endangered" by the IUCN Red List, due to ship strikes, pollution, climate change, and ocean noise. Blue whales were almost hunted to extinction by whalers to the point International Whaling Commission banned blue whale whaling.