Rays in the Gulf of Mexico

It is my firm belief that these are stingrays of the eagle ray family. They may possibly be butterfly rays. They travel in groups and have a 24-32" wingspan. They stay close to the shore and feed. They are dark on top and light underneath. They do have long tails. Their shape is unlike a manta ray in that they appear to be 2 right trianges attached to a long body and their head is forward. I love watching them. Today they came by several times as did the dolphins and once I saw an entire school of medium sized fish fly out of the ocean!