Freshwater fish (Heros autochthon). Natural History Museum catalogue number: 1961_7_7_2-4.

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Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: acanthifera, acanthoica, aquatic, atlantic, calcareous, calcium, carbonate, close-, coccolith, coccolithophorid, coccolithphore, coccoliths, coccosphere, coloured, detail, false-colour, false-coloured, flagellate, invertrebrate, marine, microbiological, microbiology, nature, north, phytoplankton, plankton, planktonic, sem, skeleton