What is the life cycle of a manta ray?

The life cycle of a manta (i think) goes something like this: A male and a female manta mate. A baby manta egg is "growing" (if u catch my meaning) inside the mother manta's belly. The egg hatches (still inside the mothers belly) The baby is born (it is rolled up like a tube so its wings are folded in) The baby's wings unfurl and the manta becomes "active" The manta is still a baby but in 4 months he/she will be an adult! Hope that helps!