And whales and dolphins have large and complex brains. The sperm whale's brain is the largest of any ever to exist, weighing four or five times as much as our human brain and being at least as fissured and convoluted. These are some of the characteristics that make cetaceans biologically special. Second , whales are ecologically special. Whales have evolved as marine mammals over millions of years, with both baleen and toothed whales probably appearing more than 25 million years ago, long before the development of human beings and the latter's intrusion into the ocean ecosystem.
Whales are at the top of the vast food chains of the sea.
Because of their size, widespread distribution, and variety of feeding patterns, cetaceans affect the ocean in special ways with global impact. Almost everything is still unknown about their role, but in many ways it appears to be ecologically unique. They fulfill a special and necessary function in the marine environment. Third , whales, are aesthetically special. They have a beauty and grace all their own which is of surpassing quality.