PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY
Algal water sample. Device being used to obtain a water sample to test for algae. Some algae produce harmful toxins that can poison humans if seafood, fish or water supplies are contaminated. Effects range from diarrhoea to paralysis by neurotoxins. Photographed in Croisic, France.
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