Diplostomum spathaceum larvae (Diplostomosis)(Digenea) in fish

Infection  may  result  in cataract  formation within the lens, leading to partial or total blindness. Starvation  may  cause a  significant reduction in condition, or even death. After penetration of the cercariae,  lesions may form on the gills, body  surface, and fins, which can cause death, especially in  young  fish, at high infection rates.