Those are some of the coolest pictures I have seen. I had some really cool pictures of Manta Rays myself when I went diving with them, but unfortunatly they were with my laptop that was jacked. But I never knew they could jump!
If you want to see mantas congregate, you go to the west coast of Costa Rica (Pacific Coast). That was the most amazing dive experience of my life. It's like scuba diving with a stealth bomber.