Pascal Kobeh / Cowtail stingray (Pastinachus sephen) male behind female, Maldives, Indian Ocean.

Pascal Kobeh / Cowtail stingray (Pastinachus sephen) half burried in sand, Maldives, Indian Ocean.

Pascal Kobeh / Cowtail stingray (Hypolophus sephen) burried in the sand, Madagascar. Indian Ocean.

Pascal Kobeh / Diver above Cowtail stingray (Hypolophus sephen) buried in the sand, Madagascar. Indian Ocean. September 2012.

Franco Banfi / Whitetail stingrays (Himantura granulata) Maldives, Indian Ocean

Franco Banfi / Whitetail stingrays (Himantura granulata) Maldives, Indian Ocean

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

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

Pete Oxford / Chupare Stingray (Himantura schmardae), Lighthouse Reef, Belize

Pete Oxford / Chupare Stingray (Himantura schmardae) swimming between Red Mangrove (Rhizophora mangle) aerial roots, Lighthouse Reef, Belize

Alex Mustard / Fantail stingray (Pastinachus sephen) resting on seabed with diver behind, Ras Mohammed National Park, Sinai, Egypt, Red Sea.

Shane Gross / Reticulate whipray (Himantura uarnak) feeding in Turtlegrass (Halophila stipulacea) seagrass bed. Masa Alam, Egypt.