Aplanes braunii (Phylum Oomycota) causes mortality in Anabas cobojius

The fresh water fish Anabas cobojius (Hamilton-Buchanan 1822), was found to be parasitised by Aplanes braunii de Bary 1888. It is the first report of Aplanes braunii to cause disease on any fish. A. braunii is a virulent parasite that caused cotton-wool disease involving the skin, fins and muscles of A. cobojius. The hyphae also penetrated deep into the tissues of the infected fish and all of them ultimately died.