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3 days ago · This implies that the ancestors of the present-day killer whale diverged from other cetaceans during the Miocene Epoch (23 million to 5.3 million years ago); most dolphin evolution took place near the beginning of this epoch.
- The Editors of Encyclopaedia Britannica
5 days ago · Sperm whales attain sexual maturity at 7 to 13 years of age and physical maturity at 25 to 45 years and have been recorded to live as long as 62 years. They feed primarily on cephalopods, including the giant squid (Architeuthis dux). The sperm whale is the most evolutionarily modified of the toothed whales.
- The Editors of Encyclopaedia Britannica
3 days ago · The World Cetacea Database. The Cetacea (whales, dolphins and porpoises) currently include 89 species that inhabit the world's oceans, lakes and rivers. Some are cosmopolitan, occurring in marine waters from pole to pole, while others are restricted by ecology and population status to small ranges of a few thousand square kilometers or less.
1 day ago · e. Evidence of common descent of living organisms has been discovered by scientists researching in a variety of disciplines over many decades, demonstrating that all life on Earth comes from a single ancestor. This forms an important part of the evidence on which evolutionary theory rests, demonstrates that evolution does occur, and illustrates ...
3 days ago · The North Atlantic right whale ( Eubalaena glacialis) is a baleen whale, one of three right whale species belonging to the genus Eubalaena, [1] all of which were formerly classified as a single species. Because of their docile nature, their slow surface-skimming feeding behaviors, their tendencies to stay close to the coast, and their high ...
3 days ago · Fin whale. The fin whale ( Balaenoptera physalus ), also known as the finback whale or common rorqual, is a species of baleen whale and the second-longest cetacean after the blue whale . The biggest individual reportedly measured 26 m (85 ft) in length, with a maximum recorded weight of 77,000–81,000 kg (170,000–179,000 lb).
3 days ago · gray whale, ( Eschrichtius robustus ), a slender baleen whale having a profusion of external parasites that give it the appearance of a barnacle -encrusted rock. The gray whale attains a maximum length of about 15 metres (49 feet). It is gray or black, mottled with white, and has short yellow baleen with coarse bristles.
