Crayfish plague

Crayfish plague
Sporangia and hyphae
Scientific classification
Domain: Eukaryota
Clade: Diaphoretickes
Clade: Sar
Clade: Stramenopiles
Class: Oomycetes
Order: Saprolegniales
Family: Leptolegniaceae
Genus: Aphanomyces
Species:
A. astaci
Binomial name
Aphanomyces astaci
Schikora, 1906 

Crayfish plague (Aphanomyces astaci) is a water mold that infects crayfish, most notably the European Astacus which dies within a few weeks of being infected. When experimentally tested, species from Australia, New Guinea and Japan were also found to be susceptible to the infection.