Al-Darwesh, A. A. R. .; Ali, A. H. .; Saud, H. A. . First Record of Calydiscoides Difficilis (Yamaguti, 1953) Young, 1969 (Monogenoidea, Polyonchoinea, Diplectaniade) on Gills of Three Fish Species off Marine Waters of Iraq. Basrah J. Agric. Sci. 2022, 35, 281-290.