Analysis of information sources in references of the Wikipedia article "List of cryptids" in English language version.
Most scientists, paleontologists and other experts believe from the fossil evidence that megalodon became extinct over 2 million years ago during the Plio-Pleistocene period, but some cryptozoologists and researchers think that this giant shark may still exist in the undiscovered depths of the ocean… Proponents of the theory of megalodon's continued existence often point to eyewitness accounts to debate the possibility of the species' survival. Occasionally, a report will surface about a large, unidentified shark in the ocean, but those accounts have been mostly discounted as tall tales. Some researchers say that the discovery of new, unfossilized teeth proves that megalodon lives, but zoologist and cryptozoology expert Ben Speers-Roesch explains that these reports are erroneous and ignore the fact that no truly unfossilized teeth have ever belonged to megalodon.