I'm not sure why someone responded that Socorro was a great place to see mobula rays. Socorro is a go to place for manta rays not mobula rays.
You'll find mobula rays throughout the Gulf of California during the summer into the fall. La Paz is a good place. Some of the dive ops there run night dives with mobulas. They use dive lights to attract and concentrate the plankton mobulas eat.
As you look for a great mobula destination and dive op, you might want to e-mail different dive ops from Cabo San Lucas to Loreto. Tell them what you're interested in seeing and see how they respond to your inquiry.
Once you get north of Loreto, you won't find much in the way of organized dive ops. The diving in places like Bahia de los Angeles is amazing and there are big schools of mobulas, but you really have to be a self-sufficient diver. It's not Holiday Inn diving. There are a few dive ops (like Rocky Point Scuba Dive) that do trips to Bahia de los Angeles during mobula season.
-AZTinman
