Flip Nicklin / Antarctic Krill (Euphausia superba) schooling underwater, this small shrimp-like crustacean is the most important zooplankton in the Antarctic food web, Antarctica
Ashley Cooper / Humpback whale (Megaptera novaeangliae) lunge feeding on Krill. Fournier Bay, Palmer Archipelago, Antarctica. December.
Franco Banfi / Krill, food for Blue whale (Balaenoptera musculus brevicauda) Mirissa, Sri Lanka, Indian Ocean
Fred Olivier / Krill (Euphausia superba) gathered in an aquarium tank after it was collected by a trawl net
Fred Olivier / Selecting krill samples (Euphausia superba) from a southern Ocean Trawl onboard icebreaker Aurora Australis
Fred Olivier / Krill (Euphausia superb) collected in a bucket
Fred Olivier / Scientists, volunteers and ship's crew observing krill collected onboard the icebreaker Aurora Australis during the 2014-15 marine science voyage, Southern Ocean
Fred Olivier / Krill collected onboard the icebreaker Aurora Australis during the 2014-15 marine science voyage, Southern Ocean
Fred Olivier / Scientists and volunteers observing krill collected onboard the icebreaker Aurora Australis during the 2014-15 marine science voyage, Southern Ocean
Jordi Chias / Gentoo penguins (Pygoscelis papua) swimming together in search of krill, Antarctic Peninsula, Antarctica.
Sylvain Cordier / Humpback whale (Megaptera novaeangliae) feeding at the surface, showing expandable throat grooves, Svalbard, Norway.
Ashley Cooper / Faeces of the Antarctic fur seal (Arctocephalus gazella) coloured pink from the seals diet of Antarctic Krill. South Orkney Islands, Antarctic Peninsula. February 2014
Ashley Cooper / Crabeater Seal (Lobodon carcinophaga) on an iceberg in Paradise Bay, Antarctica.
Ashley Cooper / Humpback whales (Megaptera novaeangliae) feeding on Krill in Wilhelmena Bay, Antarctic Peninsula
Ashley Cooper / Whales footprint, left after surfacing by Humpback Whales (Megaptera novaeangliae) feeding on Krill in Wilhelmena Bay, Antarctic Peninsula
Ashley Cooper / Gentoo penguin (Pygoscelis papua) moulting at Hannah Point, Livingston Island, South Shetland Islands, Antarctica. Their guano is normally pink from the krill that they eat, the yellow and green guan...
Tony Wu / Pygmy blue whale (Balaenoptera musculus brevicauda) subspecies of blue whale. Diving to deeper water to feed on krill after breathing at the surface. Mirissa, Sri Lanka, Indian Ocean.
Mark Carwardine / Blue whale (Balaenoptera musculus) lunging through school of krill at the surface at sunset, Sea of Cortez, Gulf of California, Baja California, Mexico, February, endangered species
Tony Wu / Blue whale (Balaenoptera musclus) diving down to feed on krill in the Indian Ocean, south of Sri Lanka.
Tony Wu / Small krill on human finger, southern coast of Sri Lanka, Indian Ocean.
Tony Wu / Krill specimen that was spat out by a Blue whale which had just come up from deeper water, Sri Lanka, Indian Ocean.
Tony Wu / Man holding up fresh Pygmy blue whale (Balaenoptera musculus brevicauda) faeces. The brilliant orange-red color derives from krill diet of the cetacean. Sri Lanka, Indian Ocean.
Tony Wu / Krill specimen that was spat out by a Blue whale, Indian Ocean, Sri Lanka.
Doug Perrine / Fin whale (Balaenoptera physalus) faeces, red orange due to diet of krill, Pelagos Sanctuary for Mediterranean Marine Mammals, Ligurian Sea, Mediterranean Sea, Italy, June.
Solvin Zankl / Antarctic krill (Euphausia superba) from deep sea Antarctic Ocean.
Cheryl-Samantha Owen / Giant model of Krill, Bird Island, Lambert's Bay, South Africa. October 2014.
Cheryl-Samantha Owen / Man looking at giant model of Krill, Bird Island, Lambert's Bay, South Africa. October 2014.
Jack Dykinga / Feeding frenzy with blue footed boobies (Sula nebouxii), brown pelicans (Pelecanus occidentalis) and gulls diving and scooping into a mass of krill and sardines, CONANP protected area, Baja Sur, Sea o...