Hello! These pictures are extracted from a movie so I hope there is enough to see to ID. I thought I was filming some kind of ray but I don't see a tail when I viewed the movie. About 50 feet, water temp 81F, Punta Tunich Cozumel.
I'm pretty sure you have a yellow stingray there. I'm not sure if the tail is just not visible in your photos, or if it is missing. It could have been bitten off, or some fishermen will cut the tail off rays to remove the barb.
REEF Headquarters | P.O. Box 370246 | 98300 Overseas Hwy | Key Largo, FL 33037 | USA Phone: 305-852-0030 | Fax: 305-852-0301 | email: REEFHQ@REEF.org