Most underwater shots have no more than 2 light sources, the sun and the strobe, and the strobe reall does most of the work. However silhoette's work brilliantly in good water like with this turtle
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Place: 60 out of 256 Avg (all users): 5.8284 Avg (commenters): 6.5263 Avg (participants): 5.5813 Avg (non-participants): 6.1944 Views since voting: 1236 Votes: 268 Comments: 20 Favorites: 0
Couldn't have done this any better. Others may not like it that much but it is a 10 in my book - for challenge, overall beauty of photo, and easy eye appeal.
Sorry, but IMHO it doesn't work. I think you got more than enough comments so far, which are telling you, that sun is not a artificial light source. So I dont't have to. Apart from it both the turtle and the surface are out of focus and the composition or cropping could be better. But I hope you had a good dive!
I very much like this photo, but giving all the leeway I can, I still can't call the SUN artificial. If this isn't sunlight, I will gladly reconsider my scoring. 5 Swash