After the FishVille Adoptable Seahorse and Sea Turtle, the latest cute creature to join the list of adoptable creatures at FishVille is the Baby Manta Ray! Lost Manta Rays will appear randomly on your tank and if you decide to help it then your friends will get a chance to adopt it from their news feed.
It simple. As soon as you find that some of your friends have found a baby manta ray through your feed, click on the link "Adopt the Manta Ray" and adopt it.
Where to find the baby Manta Ray after Adoption.
When you login to facebook's fishville, go to your gift box and you will see a baby manta ray waiting for her master.