Jack Dykinga / Cypress dome swamp with water surface covered with water-spangles and duckweed, Big Cypress Seminole Indian Reservation, Florida Everglades, USA
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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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Tony Heald / Hippopotamus (Hippopotamus amphibius) in pond, surrounded by Water lettuce (Pistia stratiotes). Mana Pools National Park, Zimbabwe.
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Denis-Huot / RF- Hippopotamuses (Hippopotamus amphibius) in water lettuces, Masai Mara Game Reserve, Kenya. (This image may be licensed either as rights managed or royalty free.)
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Denis-Huot / African jacana (Actophilornis africanus) walking on Water Lettuce (Pistia stratiotes) Masai-Mara Game Reserve, Kenya
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Denis-Huot / African jacana (Actophilornis africanus) walking on Water Lettuce (Pistia stratiotes) Masai-Mara Game Reserve, Kenya
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Denis-Huot / African jacana (Actophilornis africanus) walking on Water Lettuce (Pistia stratiotes) Masai-Mara Game Reserve, Kenya
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Denis-Huot / African jacana (Actophilornis africanus) walking on Water Lettuce (Pistia stratiotes) Masai-Mara Game Reserve, Kenya
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John Cancalosi / Green Frog (Rana clamitans) covered with duckweed. New York state, USA.
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Heidi & Hans-Juergen Koch / Green Anaconda (Eunectes murinus) young snake in water with duckweed, species is largest snake on earth and can reach 11 meters in length, native to tropical South America
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Adrian Davies / Water lettuce (Pistia stratiotes) with submerged roots in aquarium.
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Chris Mattison / Water lettuce (Pistia stratiotes), Borneo, Malaysia