Fossils reveal that some marine animals, like whales, evolved from land-dwelling creatures, specifically resembling hippos. This transformation is remarkable, highlighting the drastic evolutionary changes species undergo over time. Additionally, sperm whales are capable of emitting ultrasonic sounds that may produce shock waves, potentially incapacitating prey, although studies regarding this phenomenon yield mixed results. Such abilities emphasize the unique adaptations of marine life and the intricate relationship between evolutionary history and modern behavior.