病毒性神經壞死病是一個在許多種類海水魚嚴重的病毒性疾病，會造成經濟上嚴重的損失，感染魚隻會有視網膜與中樞神經系統的壞死。
Viral nervous necrosis (VNN) is considered to be a serious disease of several marine fish species, characterized by significant economical losses associated to vacuolating lesions of the central nervous system and the retina.