There are still massive species of whales and other types of sea creatures that eat some of the smallest creatures in the sea known as plankton.
In the distant past, there were sea creatures who feasted on the same sort of plankton in the ocean waters and scientists have found two new examples of plankton-eating fossilized fish. The new fossils are in the genus Rhinconichthys and swam in the oceans of the Cretaceous Period about 92 million years ago.
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