Andy Rouse / Galapagos green turtle (Chelonia mydas agassisi) underwater portrait, being inquisitive, note algae growing on head and shell
David Hall / Split-level of Cormorants (Phalacrocorax sp.) standing on rocks with Sea lettuce (Ulva sp.) seen underwater, Hussar Bay, Nigei Island, Queen Charlotte Strait, British Columbia, Canada. September.
David Hall / Split level of a Lion's mane Jellyfish (Cyanea capillata) and Feather-boa kelp (Egregia menziesii), Seven-tree Island, Browning Pass, Queen Charlotte Strait, British Columbia, Canada. September.
Shane Gross / Galapagos green sea turtles (Chelonia mydas agassizii) feeding on seaweed growing on lava rocks off Isabela Island, Galapagos, Ecuador. December.
Shane Gross / Two grey triggerfish (Balistes capriscus) fight over a large piece of plastic floating at the surface among sargassum seaweed (Sargassum natans) in the Sargasso Sea, Atlantic Ocean.
Claudio Contreras / Californian sea lion (Zalophus californianus) swimming in Southern sea palm (Eisenia arborea) and Giant Kelp (Macrocystis pyrifera) forest, San Benitos Islands, Baja California Pacific Islands Biosphe...
Alex Mustard / Portrait of a male short snouted seahorse (Hippocampus hippocampus) in sea oak seaweed (Halidrys siliquosa). Devon, England, United Kingdom. British Isles. English Channel. North East Atlantic Ocean.
Nick Hawkins / Sugar kelp (Sacchinaria latissima) off Nova Scotia, Canada. September
SCOTLAND: The Big Picture / Kelp forest (Laminaria digitata) with small fish, Shetland, Scotland, UK, July.
Franco Banfi / Sugar kelp (Saccharina latissima) and Sea anemones (Actiniaria) on rock near iceberg. Tasiilaq, East Greenland. April.
Franco Banfi / Sugar kelp (Saccharina latissima) near iceberg, view upwards to gap in sea ice. Tasiilaq, East Greenland. April.
Claudio Contreras / Californian Sealion (Zalophus californianus) in kelp (Macrocystis pyrifera) forest, San Benito del Este Island, Baja California Peninsula Pacific Islands Biosphere Reserve, Baja California, Mexico, Ma...
Alex Mustard / RF - Female grey seal (Halichoerus grypus) hovering in gully of kelp (oarweed: laminaria: Laminaria hyperborea). Farne Islands, Northumberland, England, United Kingdom. British Isles. North Sea. (This...
SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) swimming over kelp forest, Shetland, Scotland, UK, August.
Alex Mustard / California sea lion (Zalophus californianus) resting in the canopy of a forest of giant kelp (Macrocystis pyrifera). Santa Barbara Island, Channel Islands. Los Angeles, California, United States of Am...
Alex Mustard / Young California sea lion (Zalophus californianus) playing in the canopy of a forest of Giant kelp (Macrocystis pyrifera). Santa Barbara Island, Channel Islands. California, USA. North East Pacific Oc...
Andres M. Dominguez / Dove's-foot crane's-bill leaf (Geranium molle) and algae in ice with air bubbles, Sierra de Grazalema Natural Park, southern Spain, February.
Jeff Vanuga / Ephydrid flies (Ephydra sp) that eat microscopic algae and survives during the winter in thermal pools. Biscut Basin, Yellowstone National Park, Wyoming, USA, January.
Solvin Zankl / Kelp forest (Laminaria hyperborea), Atlantic Ocean, North West Norway, March.
Solvin Zankl / Thongweed (Himanthalia elongata) edible plant sold as 'Sea Spaghetti' for human consumption. From Roscoff, France, April. Preserved specimen.
Alex Hyde / Chlorophyte or green alga (Volvox aureus) in pond water. UK. The larger spheres are approximately 0.5mm in diameter. Digital composite image.
Jurgen Freund / Detail of Giant kelp (Macrocystis pyrifera) gas-filled bladders (pneumatocysts) Vancouver Island, British Columbia, Vancouver Island, Canada.
Pascal Kobeh / Group of California sea lions (Zalophus californianus) in a kelp forest (Macrocystis pyrifera), California, USA. Pacific ocean.
Pascal Kobeh / Group of California sea lions (Zalophus californianus) swimming in kelp forest (Macrocystis pyrifera), California, USA. Pacific ocean.
SINCLAIR STAMMERS / Timelapse of filaments of Oscillatoria, a type of Blue green algae gliding over each other, filmed using differential interference contrast.
Sue Daly / Furbelows seaweed (Saccorhiza polyschides), with fronds moving in the current, Sark, British Channel Islands, UK, June.
Brandon Cole / Red Sea Urchins (Stronglyocentrotus franciscanus) and Purple Sea Urchins (Stronglyocentrotus purpuratus) feeding on bottom algae and Giant kelp (Macrocystis pyrifera), Channel Islands National Marine...
Alex Mustard / Scenic view of a bull kelp forest (Nereocystis luetkeana) with sunlight shining through the fronds. Browning Pass, Port Hardy, Vancouver Island, British Columbia. Canada. North East Pacific Ocean.
Juan Carlos Munoz,Juan Carlos Munoz / Lesser flamingo flock (Phoeniconaias) flying over lake with green algae, aerial view, Rift valley, Kenya
Franco Banfi / Bridled parrotfish (Scarus frenatus) clownish grin reveals its power tools: grinding teeth used to scrape algae from rock, Maldives, Indian Ocean. Highly commended in the Underwater World Category of...
Chris Gomersall / 2020VISION / European river otter (Lutra lutra) cub amongst kelp on shoreline, Shetland Isles, Scotland, UK, October.
Graham Eaton / Split level shot of Llyn Idwal and Cwm Idwal, showing freshwater habitat with Green lacustrine algae (Chlorophyceae sp.), Snowdonia NP, Gwynedd, Wales, UK, August
Roberto Rinaldi / Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia) with Rainbow wrasse fish (Coris julis), Strait of Messina, Southern Italy
Alex Mustard / 2020VISION / Tufts of seaweed growing on a shallow seabed, Island of Coll, Inner Hebrides, Scotland, UK, June
Alex Mustard / 2020VISION / Meadow of seaweeds in a shallow channel between islands in the Cairns Of Coll, Island of Coll, Inner Hebrides, Scotland, UK, July
Orsolya Haarberg,Orsolya Haarberg / Brown Algae (Fucus dustuchus) making patterns in snow and sand. Skagsanden beach, Nordland, Norway, February. Highly commended in Plants category of the GDT 2011 competition.
Doug Perrine / Green sea turtle (Chelonia mydas) being cleaned of algae by Yellow tangs / surgeonfish (Zebrasoma flavescens), Puako, Kona, Hawaii, USA, June, Endangered species
Doug Perrine / Green sea turtle (Chelonia mydas) cleaned of algae by Yellow tangs / surgeonfish (Zebrasoma flavescens), Puako, Kona, Hawaii, USA, June, Endangered species
Jurgen Freund / Aerial view of a seaweed farmer tending his crop, growing agar-agar for processing into carageenan (gelatinous extracts used as binder for food or product) Philippines, May 2009
Jurgen Freund / Aerial view of a seaweed farmer tending his crop, growing agar-agar for processing into carageenan (gelatinous extracts used as binder for food or product) Philippines, May 2009.
Visuals Unlimited / An AlgaeLink Algae growing system being used to make ethanol and biodiesel. A benefit from producing oil from algae in this way rather from plant oil crops like oil seed rape is that it does not take...
Alex Mustard / Female Grey seal (Halichoerus grypus) tangled in a discarded fishing net, Lundy Island, Devon, England, UK, July 2010.
Brandon Cole / Woman (model released) explores tidepools exposed during a summer's extreme low tide. Split level view of a tidepool showing Ochre sea stars (Pisaster ochraceus), Giant green sea anemones (Anthopleura...
Niall Benvie / Enteromorpha seaweed rooted in sand, exposed by spring tide, Scotland, uk
SINCLAIR STAMMERS / Light photomicrograph of Blue green algae / Cyanobacteria (Nostoc sp) capable of nitrogen fixation, and used for soil enrichment especially with rice cultivation. The long filaments are composed of in...
SINCLAIR STAMMERS / Phase contrast photomicrograph of Blue green alga / Cyanobacteria (Spirulina platensis) each algal filament or Trichome is 5 microns in diameter.