Nurse sharks (Ginglymostoma cirratum), being fed in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Southern stingray (Hypanus americanus) over sand in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

Adult dovekie (Alle alle alle) breeding area on the island of Bolscheoya in the Svalbard Archipelago, Norway

Indonesia laboratory testing drinking water. Photograph taken in meulaboh, aceh province -december 2006, 2 years after tsunami of december 26th 2004 devastated much of coastal region. Taken to illustrate reconstruction work projects of (catholic relief services) of sponsored photo tour. terchnician : every house well gets tested. Unicef originally helped up to support other ngos in area, helps staff salaries provides us with equipment. coordinates activities with local government. water in local wells is quite contaminated, especially with arsenic, as well as nitrates, nitrites, iron, manganese fluoride. water became salinated after tsunami. We test here both water from shallow deep wells

Tiger (Panthera tigris), lying in water, Ranthambore National Park, Rajasthan, India, Asia

Tree trunks with exposed roots in the shallow waters of Spray Lakes, south of Canmore, Alberta, Canada

People walking on the shallow shore of Lago de Nicaragua, volcanic island of Ometepe and the stratovolcano Volcan Concepion at back, San Jorge, Nicaragua, Central America

Highland cattle standing in the overgrown, shallow water of a lake, Isle of Mull, Hebrides, Scotland, Great Britain

Black-winged Black-winged Stilt (Himantopus himantopus), adult, shallow water, sleeping, standing on one leg, Duemmerniederung, LK Diepholz, Lower Saxony, Germany, Europe

People sitting on the shallow shore of Lago de Nicaragua with the volcanic island of Ometepe and the stratovolcano Volcan Concepcion at back, San Jorge, Nicaragua, Central America

Yellow-billed Stork (Mycteria ibis), hunting in the shallow water at the shore of the Chobe River, Chobe National Park, Botswana, Africa

Shallow shore of the Lago de Nicaragua with the volcanic island of Ometepe and the stratovolcanoes Volcan Concepcion, left, and Volcan Maderas, right, at back, San Jorge, Nicaragua, Central America

People walking on the shallow shore of Lago de Nicaragua with the volcanic island of Ometepe and the stratovolcano Volcan Concepcion at back, San Jorge, Nicaragua, Central America

Laguna Colorada, Red Lagoon, Altiplano shallow salt lake, Potosi, Bolivia, South America

Rock in the shallow waters of the Marine Reserve Cathedral Cove, Hahei, Coromandel Peninsula, North Island, New Zealand

People walking on the shallow shore of Lago de Nicaragua, volcanic island of Ometepe and the stratovolcano Volcan Concepion at back, San Jorge, Nicaragua, Central America

Hawaii, Maui, Makena, Ahihi Kinau Natural Area Reserve, Snorkeler in clear ocean water above reef.