In fishes, ammonia is mainly excreted by a. Kidney b. Liver c. Large intestine d. Gill
Option D. The gills are the primary site of ammonia excretion in fish (Wilkie, 1997, 2002; Weihrauch et al., 2009), because they have large surface area, perfusion by 100% of cardiac output, large ventilation rates, small diffusion distances, and contact with a voluminous mucosal medium (Evans et al., 2005).
