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The contractile vacuole allows free-living protists to expel extra water. <b>The contractile vacuole allows free-living protists to expel extra water <br /></b>.
Aquatic fungi, in the broadest sense, include fungi present transiently in water, terrestrial fungi that release spores which are dispersed in water, and species that function entirely within water.Water is found in transient pools after rain, swamps, estuaries, permanent rivers and oceans.onditions in fresh water are markedly different to those in the ocean. The open sea has quite different salinity to salterns where the water is slowly evaporating. Sometimes the water is extremely acidic or toxic. Fungi are found in all these environments.