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This photograph of a Grey Nurse shark was taken in a depth of about 11 metres in the shallow cave entrance of Fish Rock off South West Rocks, NSW Australia on 16th November 2016.

I used my NikonD7200 digital SLR with a Tokina 10-17mm lens at a focal length of 11mm on manual setting and two Inon Z-240 strobes on TTL. ISO 800, 1/160th sec, aperture F10, Exposure Compensation 0.