Hemipristis Serra
The Hemipristis Serra used to be a weasel shark species during the Miocene epoch. The era was between five and 23 million years ago, and this type of shark was considerably larger and had larger teeth than any of its current modern relatives. The Hemipristis serra shark could reach lengths between 8 and 16 feet long.
The teeth markings have been identified in bones of an ancient animal called Metaxytherium, which is similar to today’s manatee. The fossils have been mostly found in the sediments of the Atlantic Ocean near southern Florida.