Unlike many sharks, manta rays do not actually have teeth and instead sieve the food particles out of the water using rows of tiny plates in their mouths, which they funnel in their mouths as they swim. Manta rays eat tiny marine organisms including microscopic plankton, small fish and crustaceans.
Despite it's large size, the relatively docile nature of the manta ray means that it is actually preyed upon by a number of large marine predators. Large species of shark such as the great white shark, killer whales and also humans are known to hunt the manta ray.
After mating the female manta ray lays a couple of eggs which actually develop and then hatch inside her. This process is known as aplacental viviparity and is quite commonly seen in the reproduction of a number of shark and ray species. Within 6 weeks of hatching, the female manta ray gives birth to 1 or 2 manta ray pups, which develop into large adults fairly quickly.
Today, although the manta ray is not considered to be a species that is in imminent danger of extinction in the wild, the manta ray population numbers have been declining more quickly in recent years. Manta rays are particularly susceptible to pollution in the water and are quickly affected by overfishing in certain areas, and therefore a lack of food.