Bloody lesions on body
Body shows one or more bloody lesions, where leeches have eaten into flesh.
Bacteria, viz. Vibrio spp. all manifest similar symptoms. Can affect almost any marine, brackish and freshwater species.
Usually fatal in 2-3 days if untreated. Very contagious. Rapid treatment is vital if fish are to have any chance. Infection tends to stay in tanks for a long time.