The strangest ancient sea monsters
The fossil record is filled with strange marine animals that would look like sea monsters if they were alive today.
Megalodon (Otodus megalodon) was another supersize version of a modern animal. Fossilized teeth suggest that megalodon, which reigned over ocean ecosystems between around 23 million and 2.6 million years ago, was at least three times longer than a modern great white shark, and the biggest shark on record. The beast's exact size is disputed in scientific circles, but it could have been up to 60 feet (18 m), or even 80 feet (24 m), long. This shark was so big, it could have devoured a modern orca (Orcinus orca) in just a few bites.
The fossil record is filled with strange marine animals that would look like sea monsters if they were alive today.