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Several mysterious incidents have raised eyebrows among researchers and enthusiasts alike. In 2013, a fishing vessel disappeared in the Pacific Ocean, leaving behind only destroyed nets and massive bite marks on its buoys—too large for any known shark species. Such evidence invites skepticism towards the claims of the Megalodon's extinction.
In 2016, an expedition in the Mariana Trench detected a massive moving object through sonar, which did not match the dimensions of any known species of shark. This led to speculation that it could have been a Megalodon or another undiscovered giant species.