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Size comparison of the great white and whale shark to estimates for megalodon Proportions of megalodon at lengths of 3 m (10 ft), 8 m (26 ft), and 16 m (52 ft), extrapolated from extant relatives, with a 1.65 m (5 ft 5 in) diver
Size comparison. Zygophyseter could reach an estimated length of 6.5 to 7 meters (21 to 23 ft), compared to the 12.5-to-18.5-meter (41 to 61 ft) modern sperm whale. [11] It is thought that this whale had twelve thoracic vertebrae and at least ten lumbar vertebrae.
It may have resembled the modern killer whale in appearance, and could represent a transitional species between the modern killer whale and other dolphins. O. citoniensis could have hunted fish and squid in pods, and coexisted with other large predators of the time such as the orcinine Hemisyntrachelus and the extinct shark Otodus megalodon.
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In the seas millions of years ago, whales were regularly hunted.Megalodons, bus-sized sharks, are believed to have been dominant ocean predators some 20 to 3.6 million years ago. The now extinct ...
Large body size is generally associated with other traits, such as having a slow rate of reproduction and, in large herbivores, reduced or negligible adult mortality from being killed by predators. Megafauna species have considerable effects on their local environment, including the suppression of the growth of woody vegetation and a consequent ...
A third type of killer whale roams the Pacific, but less is known about it; these offshore whales live farther out and prey on sharks and other large fish. A recent study found evidence of another ...
Size of Paraceratherium (dark grey) compared to a human and other rhinos (though one study suggests Palaeoloxodon namadicus may have been a larger land mammal). The blue whale is the largest mammal of all time, with the longest known specimen being 33 m (108.3 ft) long and the heaviest weighted specimen being 190 tonnes.