FIN ROT
fin rot: translation
disintegration of fish fins through bacterial infections in nature, aquaria or aquaculture, aggravated by crowding and nutritional problems in aquaculture tanks. Common in aquarium fish like mollies, especially those with dark pigment such as black mollies. The bacteria involved are Aeromonas, Pseudomonas and Flexibacter. Death may occur if it progresses too far but bathing in a salt solution, various proprietary medications and application of topical medications will prevent further development. Also called fin erosion