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It is plausible that the adult megalodon population off the coast of Peru targeted primarily cetothere whales 2.5 to 7 meters (8.2 to 23 ft) in length and other prey smaller than itself, rather than large whales in the same size class as themselves. [70] Meanwhile, juveniles likely had a diet that consisted more of fish. [34] [74]
The Lamniformes also include the extinct megalodon, Otodus megalodon. Orectolobiformes: They are commonly referred to as the carpet sharks, including zebra sharks, nurse sharks, wobbegongs, and the whale shark. Pristiophoriformes: These are the sawsharks, with an elongated, toothed snout that they use for slashing their prey.
Adults normally start reproducing when 5–10 years old and reach their full length after 20–30 years. [ 107 ] [ 108 ] [ 109 ] In the smallest rorqual, the minke whale, 3 m (10 ft) calves are born after a 10-month pregnancy and weaning lasts until it has reached about 5 to 5.5 m (16 to 18 ft) after 6–7 months. [ 110 ]
Members of the group include macropredators, generally of medium-large size, including the largest macropredatory shark ever, the extinct Otodus megalodon, as well as large planktivores. [ 2 ] Although some authors have argued that the Late Jurassic Palaeocarcharias should be considered the oldest known lamniform, this is disputed.
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A new study posits that the ancient megalodon shark was longer and slimmer than previously believed. The ancient shark has been compared to the great white, but it may have more closely resembled ...
English: A size diagram comparing various size estimates for the extinct shark Otodus megalodon to Carcharodon carcharias (great white shark), Rhincodon typus (whale shark), and a human. Also shown are megalodon specimens the estimates are based on, vertebral column IRSNB P 9893, upper anterior tooth NSM PV-19896, and lateral tooth GHC 6.
Megalodon: The Monster Shark Lives is a 2013 film that aired on the Discovery Channel about the potential survival of the prehistoric shark. Purported to be a documentary, the story revolves around numerous videos, "photographs", and firsthand encounters with a megalodon and an ensuing investigation that points to the involvement of the prehistoric species, despite the long-held belief of its ...