Juergen Freund / Seapalm kelp fixed on rocks underwater {Postelsia palmaeformis} Pacific Canada

Doug Wechsler / Giant kelp on shoreline {Macrocystis integrifolia}, at low tide, Olmpic National Park, Washington

Juergen Freund / Lion's mane jellyfish in kelp forest (Cyanea capillata) Pacific, Canada

Patricio Robles Gil / Southern Elephant Seal (Mirounga leonina) juvenile lying in kelp, South Georgia Island

DOC WHITE / Californian sealion underwater in kelp forest {Zalophus califonianus}, California, USA

GEORGETTE DOUWMA / Giant kelp holdfast (Macrocystis pyrifera) California, USA.

LYNN M. STONE / Kelp Goose pair Falkland Islands (Chloephaga hybrida) white male on right, female left

Jason Smalley / Fronds of Sea Belt Kelp {Laminariales} Kimmeridge Bay, Purbeck, Dorset, UK.

Jason Smalley / Fronds of Sea Belt Kelp {Laminariales} Kimmeridge Bay, Purbeck, Dorset, UK.

Jason Smalley / Seaweeds, Wracks and Kelps at low tide, Kimmeridge Bay, Purbeck, Dorset, UK.

Jason Smalley / Fronds of Sea Belt Kelp {Laminariales} Kimmeridge Bay, Purbeck, Dorset, UK.

Jason Smalley / A tangle of Kelp {Laminariales} at Kimmeridge Bay, Purbeck, Dorset, UK.

Jason Smalley / Seaweeds at low tide, Kimmeridge Bay, Purbeck, Dorset, UK.

Jason Smalley / Fronds of Sea Belt Kelp {Laminariales} Kimmeridge Bay, Purbeck, Dorset, UK.

Jason Smalley / A tangle of Kelp {Laminariales} Kimmeridge Bay, Purbeck, Dorset, UK.

Jason Smalley / Fronds of Sea Belt Kelp {Laminariales} Kimmeridge Bay, Purbeck, Dorset, UK.

Colin Seddon / European river otter {Lutra lutra} mother and cub. Shetland, UK.

TOM MANGELSEN / Sea Otter resting in kelp. (Enhydra lutris) California.

Steven David Miller / Seaweed at low tide, Hawksnest Cove, Freycinet National Park, Tasmania

Norbert Wu / Ochre Sea Star (Pisaster ochraceus) among intertidal algae in tide pools, Point Lobos, Monterey, California

Jeff Rotman / Sunlight through giant kelp forest. California USA

DOC WHITE / Kelp snail + barnacles on Kelp {Laminariales} Channel Is, California, USA

Jeff Rotman / Giant kelp close-up of fronds and air bladders California USA Pacific {Macrocystis pyrifera} Channel Islands

Florian Graner / Harbour porpoises {Phocoena phocoena} off Isle of Man, Irish Sea

Jeff Rotman / Purple sea urchins {Strongylocentrotus purpuratus} feeding on kelp, Pacific, California, USA

LYNN M. STONE / Kelp goose on the coast. Falkland Islands, South America

Jeff Rotman / Juvenile Seastar on kelp, Glenen Is, Brittany, France

Jeff Rotman / Giant kelp seaweed frond close-up {Macrocystis pyrifera} Pacific California, USA. Fastest growing plant - up to 24 inches / 60 cm per day.

Juergen Freund / Colonial Lion nudibranchs amongst kelp, Canada, Pacific coast

DOC WHITE / Sea Otter resting wrapped in kelp at sea surface {Enhydra lutris} California

GEORGETTE DOUWMA / Giant kelp {Macrocystis pyrifera} showing gas filled pneumatocysts which keep it floating near surface. California, USA

Jeff Rotman / Garibaldi {Hypsypops rubicunda} and Steephead fish {Semicossyphus pulcher} to right, California, Pacific Ocean, USA

Bruce Rasner/ Rotman / Megamouth shark off California USA {Megachasma pelagios} Pacific

Jeff Rotman / Norris snail {Norrisia norrisi} on Giant kelp stem, California Pacific USA

Roberto Rinaldi / Air sacks / gas-filled vesicles on kelp leaves in a kelp forest, California.

Roberto Rinaldi / Kelp leaves on the surface of water. The air sacks / vesicles cause the kelp to float, California.

Roberto Rinaldi / Kelp with air sacks / gas-filled vesicles in kelp forest, California.

Roberto Rinaldi / Scuba diver with a Weedy seadragon (Phyllopteryx taeniolatus), Australia

Roberto Rinaldi / Seals in kelp at Eaglehawk Neck, Tasmania, Australia.

Roberto Rinaldi / Scuba diver closely examining some Giant string kelp (Macrocystis augustifolia) in the waters of Eaglehawk, Tasmania, Australia

Roberto Rinaldi / Giant kelp (Macrocystis pyrifera) forest with string kelp in Fortescue Bay, Tasmania.

Roberto Rinaldi / Close-up of Giant string kelp (Macrocystis augustifolia), Eaglehawk, Tasmania, Australia. ^^^The small green bubbles, full of gas, keep the whole plant off the sea bed and floating to the surface,

Roberto Rinaldi / Garibaldi damselfish (Hypsypops rubicundus) in kelp forest, California.

Roberto Rinaldi / Yellow kelp leaves just below water surface, California.

Roberto Rinaldi / Kelp with air sacks in kelp forest, California.

Roberto Rinaldi / Kelp leaves lying on the surface of the water. The air sacks cause the kelp to float, California

Roberto Rinaldi / Weedy sea dragon (Phyllopteryx taeniolatus), Australia.

Onne van der Wal / Thick kelp, South Island, New Zealand.

Colin Monteath / Kelp holdfasts bleached and weathered on beach, Kaikoura, North Canterbury, New Zealand

Roberto Rinaldi / Kelp with air sacks in the kelp forest, California.

Suzi Eszterhas / Sea Otter (Enhydra lutris) wrapped in kelp, Monterey Bay, California

Suzi Eszterhas / Sea Otter (Enhydra lutris) mother and pup in kelp, Monterey Bay, California

Suzi Eszterhas / Sea Otter (Enhydra lutris) wrapped in kelp, Monterey Bay, California

Suzi Eszterhas / Sea Otter (Enhydra lutris) wrapped in kelp, Monterey Bay, California

Kevin Schafer / Marine Otter (Lontra felina) in kelp on shore, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) in kelp on shore, Chiloe Island, Chile

Kevin Schafer / Marine Otter (Lontra felina) resting in kelp after a big meal, Chiloe Island, Chile

David Hall / Sunflower seastar {Pycnopodia helianthoides} on seabed, beside Sea urchins and kelp, British Columbia, Canada

Tui De Roy / Humboldt Penguin (Spheniscus humboldti) swimming through kelp, Tilgo Island, La Serena, Chile

Pete Oxford / Kelp uncovered during a low tide, Steeple Jason Island, Falkland Islands

Roberto Rinaldi / Group of sea-lions playing in the kelp, Tasmania, Australia.

Roberto Rinaldi / Giant string kelp (Macrocystis augustifolia), Eaglehawk, Tasmania, Australia

Roberto Rinaldi / Potbelly seahorse (Hippocampus bleekeri), one of the largest species of seahorses, attached to kelp, Tasmania, Australia

Roberto Rinaldi / Multi-armed sunstar on kelp leaf, Antarctica.

Roberto Rinaldi / Giant string kelp (Macrocystis augustifolia), Eaglehawk, Tasmania, Australia

Roberto Rinaldi / Multi-armed sunstar (Asteroidea genus) on a big kelp leaf, Antarctica.

Roberto Rinaldi / Starfish on seabed, Tasmania, Australia.

Roberto Rinaldi / Seals in kelp in Eaglehawk Neck, Tasmania, Australia.

Roberto Rinaldi / Close-up of Giant string kelp (Macrocystis sp), Eaglehawk, Tasmania. ^^^The small green bubbles, full of gas, keep the whole plant off the sea bed and floating to the surface.

Roberto Rinaldi / Close-up of Giant string kelp (Macrocystis sp), Eaglehawk, Tasmania. ^^^The small green bubbles, full of gas, keep the whole plant off the sea bed and floating to the surface.

Roberto Rinaldi / Kelp with air sacks / gas-filled vesicles in kelp forest, California.

Roberto Rinaldi / Kelp with air sacks / gas-filled vesicles in kelp forest, California.

LYNN M. STONE / Kelp Goose, Falkland Islands (Chloephaga hybrida)

Flip de Nooyer / Kelp in tide pool, Cape Pembroke, East Falkland Islands

Gabriel Rojo / Southern black backed (Kelp) gull diving {Larus dominicans} Valdez, Patagonia, Argentina

Gabriel Rojo / Southern black backed (Kelp) gull flying {Larus dominicans} Valdez, Patagonia, Argentina

Gabriel Rojo / Southern black backed (Kelp) gulls fishing {Larus dominicans} Valdez, Patagonia, Argentina

Bernard Castelein / North Berwick beach at low tide with seaweeds. Scotland UK. Bass rock in background.

Claudio Velasquez / Isopod {Tylos granulotus} on kelp. South Africa

TOM MANGELSEN / Sea otter resting in kelp. (Enhydra lutris) California USA

Pete Oxford / Aerial view of Killer whale hunting along coast {Orcinus orca} Crozet Is S Indian ocean