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aquatic ( synonym : aquatil ; from Latin aqua 'water') are adjectives that in the field of ecology designate those living beings that have at least their center of life in liquid water , i.e. in the aquasphere . Examples are fish , amphibians and mussels as well as aquatic plants . In addition, both adjectives can also be used quite generally in the sense of “relating to water”. The opposite of aquatic andaquatil is terrestrial (from the Latin terra ' earth ', ' land ').

480 to 460 million years ago - in the early Ordovician - according to current knowledge, the first living beings succeeded in changing from an aquatic way of life to a terrestrial one. Either early species of ornamental algae from the group of Streptophyta or chandelier algae (Charophyceae or Charales) performed this so-called shore leave .

The science of aquatic organisms is hydrobiology .


  • Matthias Schaefer, Wolfgang Tischler: Dictionaries of biology: Ecology. UTB  430. 2., revised. u. exp. Edition, S. Fischer Verlag , Stuttgart / New York 1983, ISBN 3437203088 , p. 24.

Individual evidence

  1. Jan de Vries, Bruce A. Curtis, Sven B. Gould and John M. Archibald: Embryophyte stress signaling evolved in the algal progenitors of land plants. In: PNAS . Volume 115, No. 15, E3471 – E3480, 2018, doi: 10.1073 / pnas.1719230115
  2. Tomoaki Nishiyama, Hidetoshi Sakayama et al .: The Chara Genome: Secondary Complexity and Implications for Plant Terrestrialization. In: Cell . Volume 174, No. 2, 2018, pp. 448–464.e24, doi: 10.1016 / j.cell.2018.06.033
    Solid cell wall prepared for shore leave
    . On: from July 12, 2018