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This photograph of a Marine Iguana was taken in a depth of just a few metres at Cape Douglas, Isla Fernandina, Galapagos Islands on 16th December 2017.

I used my Nikon D500 digital SLR with a Tokina 10-17mm lens at a focal length of 17mm on manual setting and two Inon Z-240 strobes on TTL. ISO 800, 1/160th sec, aperture F8, Exposure Compensation 0.