Hi Spadge,
Take a look at my pics in the Egypt album and some more in the upload album.
I always take my pics from the surface of the water, most of it is luck-and an awful lot of just hanging around in the water, but having said all that, you wont be short of photo oportunities. As soon as you stick your head under the water you will see fish in every direction you look. You could try a waterfroof disposable camera, try to get one with a flash and Kodak Ultra film, even though I would love a camera with a zoom my camera doesn't have one . Just out of interest, which hotel are you staying at, if you let me know I will be able to tell you what type of fish you are likely to see.
Love SB xxx