Tilapia refers to several cichlid fish species that are important for aquaculture and subsistence fishing worldwide. These fish are generally small, with most species growing up to 18 i... Tilapia refers to several cichlid fish species that are important for aquaculture and subsistence fishing worldwide. These fish are generally small, with most species growing up to 18 inches in length. They have a deep body, a long dorsal fin, and are primarily herbivorous, though they can consume a variety of foods. Tilapia are valued for their rapid growth, tolerance to varying water conditions, and their role in controlling algae and aquatic plants in managed water systems.Click here to read more about Tilapia.