Gary Bell/ Oceanwide / Red tide, Heron Island, Great Barrier Reef, Queensland, Australia

Gary Bell/ Oceanwide / Green Sea Turtle (Chelonia mydas), Heron Island, Great Barrier Reef, Queensland, Australia

Gary Bell/ Oceanwide / Green Sea Turtle (Chelonia mydas), Heron Island, Great Barrier Reef, Queensland, Australia

Gary Bell/ Oceanwide / Yellow-banded Snapper (Lutjanus adetii) school, Heron Island, Great Barrier Reef, Queensland, Australia

Tui De Roy / Great Blue Heron (Ardea herodias), hunting newly-hatched Marine Iguana (Amblyrhynchus cristatus), Punta Espinosa, Fernandina Island, Ecuador

Mark MacEwen / Wedge-tailed Shearwaters (Puffinus pacificus) at night, Heron Island, southern Great Barrier Reef, Queensland, Australia. Taken with infra-red camera.

Pete Oxford / Great blue heron (Ardea herodias) portrait, Puerto Ayora, Santa Cruz Island, Galapagos Islands

Tim Laman / Yellow-crowned Night Heron (Nyctanassa violacea) standing on lava rock. Santiago Island, Galapagos

Tui De Roy / Great Blue Heron (Ardea herodias) portrait, Academy Bay, Santa Cruz Island, Galapagos Islands, Ecuador

Gary Bell/ Oceanwide / Silver Gull (Larus novaehollandiae), Heron Island, Great Barrier Reef, Queensland, Australia

Gary Bell/ Oceanwide / Pink Whip Ray (Himantura fai) group, Heron Island, Great Barrier Reef, Queensland, Australia

Gary Bell/ Oceanwide / Cowtail Stingray (Pastinachus sephen) buring in sand, Heron Island, Great Barrier Reef, Queensland, Australia