For a long time I believed there really was a megladon. They even showed a megladon tooth compared to a great white's. What a disappointment to find out it was a hoax
Then there could still be a few swimming around. The oceans are vast and deep. A few years ago some Japanese fishermen caught a fish thought to be extinct for 120 million years
But the Megaladon is not a deep-ocean fish. It lives in near-surface waters and prefers warm waters. The Ice-age global glaciation dropped sea-level and cooler the oceans considerably. Warm-water mega-predators did not survive. Fossil evidence disappears 1.5 million years ago. The Japanese fisherman caught a badly decomposed fish in a net and thought it was a plesiosaur, but it turned out to be a basking shark. The coelacanth is a rare and ancient endangered species once thought to be extinct but one was caught in 1938 in the Indian Ocean. Since then many hundreds have been caught. It was only a very rare species, unique in that it was discovered in the fossil record 100 years before being discovered alive.