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Pleuston are the organisms that live in the thin surface layer existing at the air-water interface of a body of water as their habitat.[1] Examples include some cyanobacteria, some gastropods, the ferns Azolla and Salvinia and the seed plants Lemna, Wolffia, Pistia, Eichhornia crassipes and Hydrocharis. Some fungi and fungi-like protists may be also found.


  1. ^ "Pleuston". Merriam-Webster Online.