Blue whales were hunted extensively for their oil and meat in the 20th century, and their populations were decimated as a result. The last blue whale was hunted in 1966 off the coast of Antarctica, and since then, they have been protected by international law. While their populations have slowly started to recover, they are still considered an endangered species. According to the researchers, they have presented the initial evidence of killer whales preying on and devouring blue whales. The study reveals that two killer whales hunted and killed two blue whales, 16 days apart from each other in 2019. In addition, another blue whale was killed by a killer whale in 2021. The research paper also mentions that the first blue whale that was taken down by the predator seemed to be a healthy adult.