If you like seafood, then you are in luck because there are many varieties of fish that are perfect for muscle building and maintenance. High in protein, a great source of vitamins and minerals, low in fat, high in calcium, and rich in vital fatty acids, fish are not just brain food. The key to muscle building for fish such as tuna and salmon is the omega-3 fatty acids, which are an essential building block for muscle and tendon development. These omegas are also thought to help regulate many other body functions that can help with overall health and stamina- blood pressure, metabolism, and oxygen levels. Some of the best fish you can add to your diet includes salmon, tuna, mackerel, sardines, and halibut.