Final answer:
Lean freshwater fish, such as trout, bass, and northern pike, have lower fat content and are rich in health-beneficial omega-3 fatty acids.
Step-by-step explanation:
Three examples of lean freshwater fish are: trout, bass, and the northern variety of pike. These fish are considered lean because they have lower fat content compared to other types of fish. Ray-finned fish, a group that includes these species, generally have a bony endoskeleton and thin fins supported by bony rays. Fishing for these species can be both a source of food and recreational activity, providing an opportunity to obtain nutrient-rich meals high in omega-3 fatty acids like eicosapentaenoic acid and docosahexaenoic acid which are beneficial for health.