response: They are actually filter feeders, so they feed on zooplankton.
history: I once swam with manta rays. They are beautiful creatures. Aw, that's nice. They're found in subtropical and tropical waters. Is that where you swam with them? Yep. What do manta rays eat?
knowledge: They are filter feeders and eat large quantities of zooplankton, which they swallow with their open mouths as they swim.