Complex sentence: Sea lice, primarily "Lepeophtheirus salmonis" and "Caligus clemensi", can cause deadly infestations of both farm-grown and wild salmon; on the Pacific coast of Canada, the louse-induced mortality of pink salmon is commonly over 80%.
Split into simpler sentences: Sea lice, primarily "Lepeophtheirus salmonis", can cause deadly infestations of both farm-grown and wild salmon. On the Pacific coast of Canada, the louse-induced mortality of pink salmon is commonly over 80%.