Gary K. Smith / Rows of Lettuce (Lactuca sativa) and salad vegetables, Eden Project, Cornwall, England, UK, May
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Ingo Arndt / African Jacana (Actophilornis africana) foraging near Hippopotamus (Hippopotamus amphibius) amid water lettuce, Masai Mara National Reserve, Kenya
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Gerry Ellis / Hippopotamus (Hippopotamus amphibius) swimming in water lettuce, with Cattle Egret (Bulbulcus ibis) perched on head, Serengeti National Park, Tanzania
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Mitsuaki Iwago / Hippopotamus (Hippopotamus amphibius) emerging from a river full of water lettuce, Botswana
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Tony Heald / RF- Hippopotamus (Hippopotamus amphibius) surrounded by water lettuce. Kruger National Park, South Africa. (This image may be licensed either as rights managed or royalty free.)
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Alex Mustard / Yellow cabbage coral (Turbinaria reniformis) growing on a coral reef, surrounded by scalefin anthias: Pseudanthias squamipinnis. Ras Mohammed National Park, Sinai, Egypt. Red Sea
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Kristel Richard / Man dressed as medieval knight riding stallion, smashing lettuce on post. Ommegang religious and historical pageant procession, Brussels, Belgium. June 2019.
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Tony Wu / Skeleton shrimp (Caprella bispinosa) female and babies on Sea lettuce. Venomous spikes on female used to protect young. Hokkaido, Japan. May.
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Gary Bell/ Oceanwide / Sea Lettuce (Ulva australis) and other alga, Hopkins Island, South Australia, Australia
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Loic Poidevin / Egyptian goose (Alopochen aegyptiaca) swimming through water lettuce with goslings, Masai Mara River, Kenya, March
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Matthew Maran / Man about to eat a beef burger with bacon, cheese and lettuce, London, UK.