Larger fish are species that grow significantly in size compared to smaller fish. Examples include tuna, sharks, and marlin, which can reach lengths of several feet and weigh hundreds of pounds. These fish often inhabit deeper waters and are known for their strength and speed, making them popular targets for sport fishing. Many larger fish play important roles in their ecosystems as predators, helping to maintain the balance of marine life. They often have specialized diets, feeding on smaller fish, crustaceans, and other marine organisms. Conservation efforts are crucial to protect these species from overfishing and habitat loss.