Are there different types of the mola mola fish?

I went to the Cayman Islands and when I went snorkeling me and my dad saw a fish with no tail fins or side fins but it had one tall, skinney fin on its back and another one right below it on its belly. It looked like the mola mola fish but at a smaller scale. We were in about 3 feet of water on top of coral. The fish was about 3 feet long and each fin was about 1 foot long. Does anyone know what kind of fish this is?