COMMON SEA DRAGON, PHYLLOPTERYX TAENIOLATUS. I took this photo of a sea dragon while scuba diving among kelp in about 15m of water. This particular sea dragon is a pregnant male, carrying a clutch of eggs at the base of his tail. Kurnell, Botany Bay, New South Wales.
Canon EOS 5D Mk III, Canon 16-35mm, f/2.8 lens at 16mm, 1/125, f/8, ISO 200, two Inon Z240 underwater strobes, Hugyfot housing, handheld