Can manta rays kill you

if they are big and you dony have inmediately attention well yes

hardly!! just coz they're big doesnt mean they can hurt u! ur not allowd 2 touch them anyway. Plus they have no sting. I suppose they might get a bit freaked out if u harpoon them though...

Manta rays lack a functional sting, sharp teeth, or other appendages with which to inflict injury. They are large, and may reach up to 7m across and weigh 1.5 T. However they are extremely graceful and manoeuvrable in the water, and the likelihood of a collision is very rare. By interacting with the manta responsibly, the chance of injury is minimal. See my profile for a link to more info.