Tuna:
Some tuna species can swim up to 43 mph. They are also warm blooded which helps them survive the cold ocean dephts.
Salmon:
Wild salmon get their pink color from eating shrimp and krill, while farmed salmon get it from nutrients added to their food.
Tilapia:
They grow to fill size in 6 months, making it cheap and easy to farm. They were raised in ponds by ancient Egypt many years ago.