Alex Mustard / A Weedy Seadragon (Phyllopteryx taeniolatus) amongst Giant Kelp (Macrocystis pyrifera). Fortescue Bay, Tasmania, Australia, March.

Alex Mustard / A diver comes face to face with a Weedy Seadragon (Phyllopteryx taeniolatus). Waterfall Bay, Eagle Hawk Neck, Tasmania, Australia, March.

Alex Mustard / A male Golden / White's Seahorse (Hippocampus whitei) giving birth. Female seahorses lay their eggs into the male's brood pouch, where they develop. Manly, New South Wales, Australia, March.

Alex Mustard / A Leafy Seadragon (Phycodurus eques), photographed from below. Wool Bay Jetty, Edithburgh, Yorke Peninsular, South Australia. Australia.

Alex Mustard / A portrait of a male White's Seahorse (Hippocampus whitei). Chowder Bay, Sydney Harbour, New South Wales, Australia, November.

Juergen Freund / Lyle Squire releasing a Potato grouper / cod {Epinephelus tukula} after inserting a radio transmitter into its belly, as part of the Coral Reef census, Lizard Island, Queensland, Australia, April 2008