鏈球菌感染症為常見的魚隻疾病，造成水產養殖業嚴重的經濟損失。常見的水產動物分離鏈球菌有魚型鏈球菌（Streptococcus iniae）（或稱海豚鏈球菌）、無乳鏈球菌（S. agalactiae）、與乳酸球菌（Lactococcus garvieae）等。
Streptococcosis is a common disease in fish and responsible for significant economic losses in aquaculture. Streptococcus iniae, S. agalactiae, and Lactococcus garvieae are commonly isolated from fish streptococcosis.