1 on 1 no chance versus a male, maybe 1-2/10 a female. The orca's (Orcinus orca) size of up to 31 feet (9.4 meters) makes it the largest dolphin. Killer whales are formidable opponents of the great white — long thought to be kings of the ocean — according to a 2019 study published in Nature. The sperm whale (Physeter macrocephalus), on the other hand, may not be the biggest whale, but it has the biggest brain to have ever existed on Earth. Depends on what you consider a defeat. This … Here a solo female orca swims right up to the pod which has a bull and bites one of them before harassing them for 20 minutes while the sperm whales do nothing but enter a defensive formation. I’m eventually going to cover this topic in my blog, but I will say my opinion on this issue: First, size: Livyatan will vary in size between cows and bulls like modern whales, but C. megalodon will vary even more. Depends on the selection. An orca can definitely take down a whale the same size or smaller, but grown sperm whales … They are also known as orcas and can grow to 31ft (9.5m) long. A comparison chart of whale sizes helps put it all in perspective! They have around 50 conical teeth, which they use to … "Killer whale attacks on sperm whales have rarely been observed or reported," said Robert Pitman, a marine ecologist with NOAA's Southwest Fisheries Science Center. It should also be noted that there have been incidents where bull sperm whales organized to help fend off attacks by killer whale pods. Despite their name, killer whales are actually dolphins. Orcas versus sperm whale pod. In addition, Orcas do attack and kill adult sperm whale cows, which have teeth, far superior numbers and organization, and reach 36 feet in length and 27 tons. Sperm whales do not have many predators, killer whales (orcas) are known to have attacked sperm whales and occasionally sharks; but since the early 1700s by … A mosasaur? 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