1) Water mould 
Oomycota or oomycetes (t) form a distinct phylogenetic lineage of fungus-like eukaryotic microorganisms. They are filamentous, microscopic, absorptive organisms that reproduce both sexually and asexually. Oomycetes occupy both saprophytic and pathogenic lifestyles – and include some of the most notorious pathogens of plants, causing devastating ...
A member of the Oomycetes. 
A fungus that produces oospores. An order of the phycomycetes.
any of various algaelike fungi constituting the phylum Oomycota of the kingdom Fungi (or the class Oomycetes of the kingdom Plantae), characterized by the formation of oospores.