The article investigates the occurrence and distribution of the reproductive spores or propagules of the aquatic fungi Saprolegniales in natural water bodies. Routine estimations from Windermere lake, Esthwaite Water and Wraymires hatchery in England reveals that the high estimation figures of propagules is correlated with heavy rainfall and high lake levels. Analysis also suggests that the consumed fish food and dead fish constitute the most significant substrata for the aquatic fungi in the Wraymires hatchery.