Megalodon spotted on sonar? Researchers fooled by Atlantic mackerel

How intelligent are sharks? I saw a picture comparing the brain of a shark compared to the brains of a dolphin and the shark was much smaller. Are sharks mostly instinctive?

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Explaining the Megalodon Shark 'Sightings' Off New England Coast – NBC Boston

Shark Institute: Atlantic Shark Institute's research team witnesses Megalodon shark-like creature on sea scan. Find out the truth - The Economic Times

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50-foot 'megalodon' detected in Atlantic Ocean stuns scientists

Megalodon' Figure Shocks Shark Researchers Off New England Coast – NBC Boston

Explaining the Megalodon Shark 'Sightings' Off New England Coast – NBC Boston

Mysterious megalodon-like 'creature' detected in Atlantic was actually just a school of MACKEREL

What is the fastest predator in the ocean? - Quora

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50-foot 'megalodon' detected in Atlantic Ocean stuns scientists