Images: 

Firstly, I apologize for the photograph.  It is less than ideal.  I took it snorkeling, not diving, and I and my camera are both especially limited when snorkeling.

I think it might be a Caesar grunt.  Am I right?

Grecian Rocks, Key Largo, Florida, less than ten feet of water, bottom temperature probably 80 to 82 degrees Fahrenheit, June 20, 2011.

Thank You,

Marty