No. It is the largest carnivorous fish known to have existed, and quite possibly the largest shark to have ever lived. It is believed that the average size of the megalodon was between 12 metres (39 ft) and 18 metres (59 ft).
But the size of a modern female blue whale is over 30 mtrs (115 feet) which makes so far as we know the largest animal that has ever existed. ( Until we find fossils of something bigger).
So the Megalodon was probably bigger than some smaller whales but not the Blue whale.
Also since sharks don't have a bony skeleton this size is an estimation based on the assumption that the size to tooth ratio is the same of present large sharks but this could be in error.
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Some People Think That The Megalodon Is Bigger Than The Blue Whale. The Blue Whale Is Even Bigger Than Liopluerodon. In Fact, Liopluerodon Is THOUGHT To Be 25 Meters Long Or More. But This Is False. It Only Grew To 10 Meters Long. While Megalodon Is Thought By Some People To Be 40 Meters Long Or Other. This Is False As Well! Megalodon Only Grew Up To 18 Meters Long. The Blue Whale Is Bigger Than Both Of Them. The Blue Whale Grows Up To 30 Meters. Leedisitchis Could've Grew Up To 27 Meters Long.
A megalodon was 60-70ft long, a Blue whale is 100ft long and one recorded at 110ft long, so NO A meg is not bigger than a blue.
I don't know. Some say the blue whale some say the megalodon shark. My head is spinning I'm so confused. I'm sorry I can't answer this question correctly! Peace! :)