Saprolegnia ferax

a fungus that attacks living fish and tadpoles and spawn causing white fungus disease: a coating of white hyphae on especially peripheral parts (as fins)

生きている魚、オタマジャクシ、卵を攻撃し、水カビ病（特にひれなどの末端部分に白い菌糸が覆う症状）を引き起こす菌類