I realize it is nearly impossible to make an identification without a photo. I am interested in your thoughts, your educated guesses.
I put my scuba gear on in the water. Yesterday I was gearing up to make a dive in Key Largo, Florida, near the red nun, in 25 feet of water; my camera was not handy. I saw a huge fish about to swim past me. I was on the surface; it was about ten feet down. I was about to point it out to my wife and say, "Shark." It was probably nine-feet long, and I have seen nurse sharks come by like this before.
But this was not a shark; it was a very large fish. There were two of them, swimming side by side. The second one was about four feet. I am pretty sure they were both the same species. The huge one looked like a giant barracuda, but I think it was much too big to be a barracuda. Also, these two fish were swimming steadily by; barracuda tend to "hang."
Any guesses? My hope is one of you will have a suggestion that I will check out and recognize.
Thank you so much. Diving is education.