Koi Herpesvirus (KHV)

Koi Herpesvirus (KHV) is a contagious virus that affects koi and common carp, causing severe illness and often death. It primarily attacks the fish's skin, gills, and internal organs, leading to symptoms like lethargy, weeping lesions, and gill damage. The virus spreads quickly through shared water, infected fish, or contaminated equipment. While there’s no cure, affected fish can sometimes recover with supportive care, and prevention includes good biosecurity and quarantine measures. KHV is a major concern for koi enthusiasts and breeders because of its potentially devastating impact on fish populations.