All types of edible fish are high in nutrients and protein and can be the highlight of a tasty meal. Common types of fish are cod, hake, and haddock. These are generally white kinds of fish with a delicate taste and mild flavor. Also, darker colored fish such as pink salmon or red tuna are very popular due to their rich taste and omega-3 fatty acids. Most supermarkets and restaurants stock a wide range of fish varieties from all over the world.