Enrique Lopez-Tapia / People in boat on a river in the Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh. UNESCO World Heritage Site. June 2012.

Enrique Lopez-Tapia / Wildlife viewing platform, with chital deer (Axis axis) in the distance, Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh. UNESCO World Heritage Site. June 2012.

Enrique Lopez-Tapia / Mudskipper (Periophthalmus) the Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh. UNESCO World Heritage Site. June 2012.

Enrique Lopez-Tapia / Boats at the river edge, the Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh. UNESCO World Heritage Site. June 2012.

Enrique Lopez-Tapia / Boat in the Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh, UNESCO World Heritage Site. June 2012.

Enrique Lopez-Tapia / Boats in the Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh, UNESCO World Heritage Site. June 2012.

Luiz Claudio Marigo / Red mangrove (Rhizophora mangle) swamps, Los Haitises National Park, Samani Province, Dominican Republic, Espanola / Hispaniola Island, Caribbean Sea.

Anup Shah / Group of Proboscis monkeys (Nasalis larvatus) sitting on the mudflats of a mangrove swamp revealed at low tide, Bako National Park, Sarawak, Borneo, Malaysia, March

Staffan Widstrand / Mangrove vegetation growing in shallow salt water. Santa Cruz Island, Galapagos, Ecuador, April.

Jouan & Rius / Photographer, Catherine Jouan, photographing in mangrove swamp, Bako NP, Borneo, Sarawak, Malaysia. Model released

Steven David Miller / Great Blue Heron (Ardea herodias) fishing in mangrove pond, Everglades NP, Florida, USA.

Tim Laman / Rubbish caught up amongst the mangroves from a badly polluted river draining a major Balinese city. Sanur vicinity, Bali, Indonesia. May 2006