Who does a manta ray hide from?

Manta Rays hide from sharks and killer whales. well that's what me and my friend Abby said. How can we help an Manta ray please respond at Fleabug9612@Yahoo.com thank u i would love to help please respond my name is Felicia. Thank you

coz of their size, the manta ray's only enemy (other than humans) are sharks. I don't think manta rays & killer whales live near enought 2 each other the warrant hiding...