This module provides students with an understanding of fi sh health issues, relevant to aquaculture and wild fisheries. Disease diagnosis, bio-security in aquaculture, disease control, and treatment will be discussed and students will be introduced to the common aquatic diseases that occur primarily in tropical fi shes. Students will be provided with hands-on opportunities to examine the host, environment and pathogen relationships. A wide range of exotic and endemic diseases including parasitic conditions and the immune response of aquatic animals are reviewed through case histories for a variety of species.