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This photograph of an Australian Sea Lion was taken in a depth of about just a few metres near Hopkins Island, South Australia on 24th April 2019.

I used my Nikon D500 digital SLR with a 10-17mm Tokina lens at a focal length of 16mm on manual setting and two Inon Z-330 strobes on TTL. ISO 500, 1/250th sec, aperture F16, Exposure Compensation 0.