There is no definitive answer to this question as it depends on a number of factors, including the specific species of whale, the size and age of the whale, and its environment. In general, however, some of the most dangerous whales include sperm whales, orcas (killer whales), and blue whales.
Sperm whales are large predators that can grow up to 60 feet long and weigh over 40 tons. They are known to be aggressive and have been known to attack humans. Orcas (killer whales) are also large predators that can grow up to 30 feet long and weigh up to 10 tons. They are highly intelligent animals with a complex social structure, and they have been known to attack humans in captivity. Blue whales are the largest animals on Earth, reaching lengths of over 100 feet and weights of over 200 tons. Although they are not typically aggressive towards humans, their size makes them potentially dangerous if they were to collide with a boat or other object.