Jan Hamrsky / Brine shrimp or monkey shrimp (Artemia salina) female. Controlled conditions.
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Nick Upton / Great crested newt (Triturus cristatus) male courting a female by arching his back and waving his tail in a garden pond at night, surrounded by Water fleas (Daphnia pulex), near Wells, Somerset, UK, M...
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Nick Upton / Great crested newt (Triturus cristatus) male in a garden pond at night, surrounded by Water fleas (Daphnia pulex), Mendip Hills, near Wells, Somerset, UK, March. Photographed under license.
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Nick Upton / Two male Palmate newts (Lissotriton helveticus) swimming in a garden pond at night surrounded by Water fleas (Daphnia pulex), near Wells, Somerset, UK, March.
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Nick Upton / Palmate newt (Lissotriton helveticus) male in a garden pond at night with webbed hind feet spread wide, surrounded by Water fleas (Daphnia pulex), near Wells, Somerset, UK, March.
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Nick Upton / Two male Palmate newts (Lissotriton helveticus) swimming in a garden pond at night surrounded by Water fleas (Daphnia pulex), near Wells, Somerset, UK, March.
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Will Watson / Tadpole shrimp (Triops mauritanicus) on white background. Coastal grazing marsh, Tangiers Province, Morocco.
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Floris van Breugel / Brine shrimp (Artemia) the only other plentiful animal that survives under water at Mono Lake. Mono Lake, California, USA.
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Nick Upton / Pair of Great crested newts (Triturus crustatus) and a Palmate newt (Lissotriton helveticus) swimming in a pond, surrounded by Water fleas (Daphnia pulex), Somerset, England, UK, February. Filmed at...
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Nick Upton / Male Great crested newt (Triturus crustatus) displaying to a female in a pond, with another female swimming past feeding on Water fleas (Daphnia pulex), Somerset, England, UK, February. Filmed at nig...
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Ammonite / Group of Water fleas (Daphnia) swimming. Controlled conditions.
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Ammonite / Group of Water fleas (Daphnia) swimming. Controlled conditions.