Lymphocystivirus cause mass mortality events like megalocytiviruses and ranaviruses, fish with lymphocystis exhibit grossly visible papilloma-like skin lesions which substantially reduce their commercial value. No vaccines are currently available for lymphocystis viruses. Group: dsDNA The genus "Lymphocystivirus" has only one species: "Lymphocystis disease virus 1" (LCDV-1), but Lymphocystis disease virus 2 (LCD-2) is another virus that has been proposed as a second member. LCDV-1 infects European flounder "Platichthys flesus" and European plaice ("Pleuronectes platessa"). LCDV-2 infects the common dab ("Limanda limanda"). A third species Lymphocystis disease virus C has also been proposed based on the relative lack of sequence similarity of
Comb flounder Comb flounder The comb flounder, "Marleyella bicolorata", is a flatfish of the family Pleuronectidae. It is a demersal fish that lives on saltwater bottoms at depths of between . Its natural habitat is the tropical waters of the western Indian Ocean, from KwaZulu-Natal and Mozambique in Southern Africa, to coastal Tanzania and Kenya in the African Great lakes region, to Somalia in the Horn of Africa, to Karnataka and Maharashtra in India. It can grow up to in length. The comb flounder is a right-eyed flatfish. Its upper (eyed) side is dark brown, marked with vaguely cruciform dark spots and