Mantra ray surrounded by fish.

Teira batfish swim against the current near Lady Elliot Island, Queensland.

Speckled flowery-cod.

Olive sea snake, Ashmore Reef.

School of cardinal fish swirling around a gorgonian coral garden, Ashmore Reef.

Red horned sea star starfish.

Mantra ray beneath dive boat.

Green turtle.

Threadfin butterfly fish.

Diver on an Australian Geographic Society-sponsored expedition aboard the Undersea Explorer, in the northern Great Barrier Reef, Queensland.

Minke Whale (Balaenoptera acutorostrata), northern Great Barrier Reef Queensland.