Sweepers on the Wreck of the Ulysses, Egypt, Red Sea.
Photo copyright Tim Nicholson, whose underwater photographs and photo books are available from http://www.photoboxgallery.com/timnicholson.
Taken on the Ulysses, Red Sea, Egypt.

 
Further Reading
The Underwater Photographer: Digital and Traditional Techniques, by Martin Edge, Paperback, 424 pages (2006)
The Essential Underwater Photography Manual: A Guide to Creative Techniques and Key Equipment, by Denise Nielsen Tackett and Larry Tackett, 176 pages (2005).
Shipwrecks from the Egyptian Red Sea by Ned Middleton; Immel Publishing, 196 pages.

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