Cheryl-Samantha Owen / Looking down on sea grass, Aldabra Atoll, Seychelles, Indian Ocean

Alex Mustard / 2020VISION / A captive Yellow / Spiny seahorse (Hippocampus guttulatus) attached to plastic seagrass, Weymouth Sealife Centre, Dorset, England, UK.

Juergen Freund / Dugong (Dugong dugon) in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines

Juergen Freund / Diver watching a swimming Dugong (Dugong dugon). Dimakya Island, Palawan, Philippines, April 2010.

Juergen Freund / Split-level shot of a pet baby Hawksbill turtle (Eretmochelys imbricata) swimming in the shallows. Tunnung Island, New Hanover, Papua New Guinea, June 2010.

Alex Mustard / A young Spiny / Yellow / Longsnouted Seahorse (Hippocampus guttulatus), in an aquarium attached to plastic seagrass leaves. This seahorse is part of a UK seahorse breeding program. Photographed at the...

Alex Mustard / A Leafy Seadragon (Phycodurus eques) swims over a seagrass bed. Wool Bay Jetty, Edithburgh, Yorke Peninsular, South Australia, November.

Alex Mustard / A male Spiny Seahorse (Hippocampus guttulatus) hides in seagrass. Etang De Thau (Thau Lagoon), Montpellier, France, Europe, September.

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed with trevally fish inspecting the disturbed sand. Dimakya Island, Palawan, Philippines

Onne van der Wal / Young man snorkeling over seagrass bed, holding a starfish, The Grenadines, Caribbean. February 2010, Model released.

Onne van der Wal / Green turtle (Chelonia mydas) swimming over sea grass, Grenadines, Caribbean, February 2010.

Claudio Contreras / Cushion sea star (Oreaster reticulatus) on Turtle grass (Thalassia testudinum) Banco Chinchorro Biosphere Reserve, Caribbean Sea, Mexico, July

Wild Wonders of Europe / Pitkin / Dusky grouper (Epinephelus marginatus) by seagrass, Cala di Grecu, Lavezzi Islands, Corsica, France, September 2008

Juergen Freund / Saltwater crocodile (Crocodylus porosus) swimming at water surface, split-level, New Guinea, Indo-pacific

Wild Wonders of Europe / Pitkin / Dusky Grouper (Epinephelus marginatus) by seagrass, Endangered, Cala di Grecu, Lavezzi Islands, Corsica, September 2008 WWE Mission: Lavezzi Island Reserve, Corsica

Doug Perrine / Pair of Robust ghost pipefish {Solenostomus cyanopterus} mimicing seagrass, Mabul Island, Sabah, Malaysia

Doug Perrine / Bottlenose dolphin {Tursiops truncatus} swimming over seagrass, Belize

Norbert Wu / Seagrass beds serve as sediment traps and nurseries, Palau

Jose B. Ruiz / Neptune seagrass {Posidonia oceanica} forms large prairies of grass in well lit seabeds. Mediterranean

Juergen Freund / Dugong grazing on sea grass {Dugong dugon} Indo Pacific

Juergen Freund / Dugong grazing on sea grass {Dugong dugon} Indo Pacific

Solvin Zankl / A variety of foraminiferes from a sand sample collected in Raja Ampat, Indonesia. The shells come from pelagic as well as bottom dwelling species that settle on sand, seagrass or coral reefs. (Clavuli...

Alex Mustard / A common cuttlefish (Sepia officinalis) above seagrass meadow (Posidonia oceanica). Xlendi Bay, Gozo Island, Malta, Mediterranean Sea.

Alex Mustard / 2020VISION / Nudibranch (Facelina auriculata) searching for its food of small hydroids by climbing on a blade of Seagrass / Eelgrass (Zostera marina) in seagrass meadow. Helford Estuary, Cornwall, UK, July

Alex Mustard / Turtle seagrass (Thalassia testudinum) a shallow seagrass meadow in a lagoon behind a coral reef, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Graham Eaton / Green Sea Turtle (Chelonia mydas) swimming over seagrass. Akumal, Mexico, February.

Graham Eaton / Common Stingray (Dasyatis pastinaca) and fish above seagrass. Akumal, Mexico, February.

Christian Ziegler / Cushioned Star (Oreaster reticulatus) in seagrass with schooling fish, Twin Cays, Carrie Bow Cay, Belize

Juergen Freund / Seagrass / bristle-tailed filefish (Acreichthys tomentosus) hunting over seabed, North Sulawesi, Indonesia.

Juergen Freund / Tape seagrass (Enhalus acoroides) in the shallows with large shoal of schooling golden fish feeding on the seagrass blades, Komodo NP, Indonesia.

Juergen Freund / Tape seagrass (Enhalus acoroides) in the shallows amongst the corals, Komodo NP, Indonesia.

Juergen Freund / Tape seagrass (Enhalus acoroides) in the shallows, Komodo NP, Indonesia.

Juergen Freund / Split level view of seagrass beds and Tetepare island, the largest uninhabited island in the South Pacific, Solomon Islands, July 2010, Seagrass beds of Tetepare Island attracts dugong who feed here r...

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines.

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines.

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines.

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines.

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines.

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines.

Juergen Freund / Dugong (Dugong dugon) feeding in the seagrass bed shadowed by a trevally. Dimakya Island, Palawan, Philippines.

Juergen Freund / Split-level shot of a pet baby Hawksbill turtle (Eretmochelys imbricata) swimming in the shallows. Tunnung Island, New Hanover, Papua New Guinea, June 2010.

Juergen Freund / Common / Spotted seahorse (Hippocampus kuda) in the sandy seagrass, Palawan, Philippines, Indo-pacific.

Juergen Freund / Oval seagrass (Halophila ovalis) food for the endangered Dugong, Palawan, Philippines, Indo-pacific.

Juergen Freund / Seagrass filefish (Acreichthys tomentosus) camouflaged amongst seagrass, Palawan, Philippines.

Juergen Freund / Blue tuxedo / Splendid jewel box sea urchin (Mespilia globulus) well camouflaged with seagrass and other natural objects attached to it. Palawan, Philippines, Indo-pacific.

Juergen Freund / Tetepare women monitor seagrass growth as part of the conservation programme of the Tetepare Descendants Association, Tetepare Island, Western Province, Solomon Islands, Melanesia, July 2010

Alex Mustard / Portrait of a Common / Short Snouted Seahorse (Hippocampus hippocampus) in seagrass. Isola La Maddelena, Sardinia, Italy, Mediterranean Sea, August.

Alex Mustard / A Leafy Seadragon (Phycodurus eques) swims over seagrass meadow. Wool Bay, Edithburgh, South Australia, November.

Alex Mustard / An adult female Spiny Seahorse (Hippocampus guttulatus) in a meadow of seagrass (Zostera marina). Studland Bay, Dorset, England, UK, August. Photographed under licence from Marine Management Organisat...

Alex Mustard / A Deep-Snouted / Broadnosed Pipefish (Syngnathus typhle) head in profile. The flattened body shape of this species resembles a blade of seagrass aiding its camouflage. Swanage Bay, Dorset, England, UK...

Alex Mustard / A Leafy Seadragon (Phycodurus eques) swims over seagrass. Wool Bay Jetty, Edithburgh, Yorke Peninsular, South Australia, November.

Alex Mustard / An adult female Spiny Seahorse (Hippocampus guttulatus) in a meadow of seagrass (Zostera marina). Studland Bay, Dorset, England, UK, August. Photographed under licence from Marine Management Organisat...

Alex Mustard / A male Leafy Seadragon (Phycodurus eques) carrying eggs under his tail. Wool Bay Jetty, Yorke Peninsula, South Australia, Australia, December.

Alex Mustard / An adult Leafy Seadragon (Phycodurus eques) swims over a bed of seagrass. Wool Bay Jetty, Edithburgh, Yorke Peninsular, South Australia, November.

Alex Mustard / A female Spiny Seahorse (Hippocampus guttulatus) in a seagrass meadow. Thau Lagoon, Montpellier, France, Europe, September.

Alex Mustard / A Great Pipefish (Syngnathus acus) peers out from filamentous algae that is overgrowing a seagrass bed (Zostera marina). Studland Bay, Dorset, England, UK, May.

Alex Mustard / A diver watching a Weedy Seadragon (Phyllopteryx taeniolatus) as it swims over a seagrass meadow. Flinders Jetty, Mornington Peninsular, Victoria, Australia, March.

Juergen Freund / Robust ghost pipefish (Solenostomus cyanopterus) on the sandy bottom. This species is often found in seagrass, which it closely resembles. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Robust ghost pipefish (Solenostomus cyanopterus) on the sandy bottom, looking like a piece of seagrass. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Thorny seahorse (Hippocampus hystrix) well hidden amongst seagrass. Lembeh Strait, Sulawesi, Indonesia

Alex Mustard / A large female Bull shark (Carcharhinus leucas) cruises over sea grass. Walkers Cay, Northern Bahama Islands, Republic of Bahamas. March

Alex Mustard / A long exposure of a Lemon Shark (Negaprion brevirostris) over seagrass. Little Bahama Bank, Bahamas. West Atlantic Ocean. March

Claudio Contreras / Cushion sea star (Oreaster reticulatus) on Turtle grass (Thalassia testudinum) Contoy Island National Park, Caribbean Sea, Mexico, May

Tim Laman / Seagrass habitat adjoining Red Mangroves at the edge of a small mangrove island, Belize Cays, Belize.

Tim Laman / Seagrass habitat adjoining Red Mangroves at the edge of a small mangrove island, Belize Cays, Belize.

Tim Laman / Rich invertebrate life including corals, tunicates and sponges, cover the underwater portions of Red mangrove roots {Rhizophora mangle} on offshore mangrove island, Tunicate Cove, Belize.

Wild Wonders of Europe / Pitkin / Dusky grouper (Epinephelus marginatus) amongst rocks with seagrass growing, Cala di Grecu, Lavezzi Islands, Corsica, France, September 2008

Wild Wonders of Europe / Pitkin / Dusky grouper (Epinephelus marginatus) by seagrass with other smaller fish in the background, Cala di Grecu, Lavezzi Islands, Corsica, France, September 2008

Wild Wonders of Europe / Pitkin / Dusky grouper (Epinephelus marginatus) by seagrass, Cala di Grecu, Lavezzi Islands, Corsica, France, September 2008

Juergen Freund / Saltwater crocodile (Crocodylus porosus) resting underwater on seabed, amongst eelgrass, New Guinea, Indo-pacific

Michele Westmorland / Split level view of shallow seagrass system and mangroves in background. McLaren (Kofulu) Harbour, Tufi, Papua New Guinea

GEORGETTE DOUWMA / Longbarbel goatfish (Parupeneus macronemus) feeding in seagrass accompanied by wrasses hoping to catch escaping prey. Egypt, Red Sea

Shattil & Rozinski / Aerial view of intracoastal waterway with spoil islands and seagrass beds, Gulf of Mexico, Texas, USA, 1999

GEORGETTE DOUWMA / Seagrass filefish (Acreichthys tomentosus) portrait. New Guinea, Indo-Pacific.

Doug Perrine / Green turtle {Chelonia mydas} feeding on seagrass in shallow waters, Sipadan Island, Sabah, Borneo, Malaysia

Doug Perrine / Juvenile Shrimpfish / Razorfish {Aeoliscus strigatus} mimic floating blades of seagrass, Malapascua Island, Cebu, Philippines

GEORGETTE DOUWMA / Spottail wrasse {Coris caudimacula} amongst seagrass, Red Sea, Egypt.

Juergen Freund / Dugong grazing on seagrass {Dugong dugong} Sulu-sulawesi seas, Indo-pacific

GEORGETTE DOUWMA / Seagrass filefish {Acreichthys tomentosus} Papua New Guinea

Chris Newbert / Longfin Batfish (Platax teira) juvenile in Tape Seagrass (Enhalus acoroides) 10 feet deep, Solomon Islands

Norbert Wu / Mangrove (Rhizophora sp) and Seagrass act as sediment traps and nurseries, spread by floating seeds, Palau

Norbert Wu / Seagrass beds are valuable sediment traps to keep water clear, Palau

Elizabeth White / Dead seagrass at high tide mark on beach, Western Australia

Juergen Freund / Penshell {Pinna carnea} in seagrass on seabed Caribbean sea

Jeff Rotman / Australian sealion {Neophoca cinerea} playing, South Australia

Jeff Rotman / Australian Sealion {Neophoca cinerea} plays in seagrass, South Australia

Jeff Rotman / Tiger shark resting on seabed with seagrass {Galeocerdo cuvier} Bahamas, Caribbean Sea.

Constantinos Petrinos / Sea grass / turtle grass {Ehalus acoroides} Lembeh, Sulawesi, Indonesia

Francis Abbott / Neptune grass flowers {Posidonia oceanica} Menorca

Francis Abbott / Neptune grass {Posidonia oceanica} Mediterranean

Francis Abbott / Neptune grass flowers {Posidonia oceanica} Menorca

Francis Abbott / Neptune grass flowers {Posidonia oceanica} Menorca,

GEORGETTE DOUWMA / Starfish {Linckia laevigata} on seagrass at low tide. Sulawesi, Indonesia

GEORGETTE DOUWMA / Horned seastars {Protoreaster nodosus} in seagrass at low tide. Sulawesi,