Ancient species called Eagle sharks lived 93 million years ago, predated manta rays
They were little by little replaced by manta rays and devil rays, which developed at the beginning of the Tertiary period.
from http://www.firstpost.com/tech/science/ancient-species-called-eagle-sharks-lived-93-million-years-ago-predated-manta-rays-9437761.html
from http://www.firstpost.com/tech/science/ancient-species-called-eagle-sharks-lived-93-million-years-ago-predated-manta-rays-9437761.html
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