Blue Marlin

• The blue marlin is a carnivorous fish that measures up to 14 feet long and can weigh up to 1,985 pounds. These fish live in the Atlantic, Pacific and Indian Oceans and range from tropical to temperate waters. They have a deep, blue back that blends into a silver color, which runs from their eye to their tail, and the silver blends into a silver-white belly. Blue marlin are characterized by their claw-shaped dorsal fin, which begins at the end of the gill flap, and a long, spear-like upper snout. They feed on mackerel, squid and tuna.
  
  

Atlantic Cod

• The Atlantic cod is an omnivorous fish that measures up to 6.5 feet long and weigh up to 210 pounds. They live from shallow waters near the coast to the edges of the continental shelves from North Carolina, north to Iceland, Greenland and east to Europe. In European waters, they live in the Bay of Biscay (along the north shore of Spain and west coast of France) north to the Barents Sea (north of Finland and northeast Russia). Atlantic cod are brown, green or gray on their backs and upper sides and pale along their bellies. They eat fish, crustaceans, krill, copepod larva and will even eat their own kind.
  
  

Pacific Halibut

• The Pacific halibut is a carnivorous flatfish that can grow up to 8 feet long and weigh 700 pounds, according to fishex.com. The fish live in the northern Pacific Ocean and can be found along the coast of Alaska and in the Gulf of Alaska. Pacific halibut, like all flatfish, swim on their sides and have both eyes on the side of their bodies. Their color varies, depending on the environment in which they grow. Their upper side is dark where their underside is white. They feed on cod, crab, pollack, shrimp, herring, turbot and sand lance.
  
  

Atlantic Mackerel

• Atlantic mackerel are carnivorous fish that can grow up to 16.5 inches long and weigh a little over 2 pounds. They live from North Carolina, to Labrador, to the Baltic Sea in the west, and, in the east, they live in the Mediterranean and Black Seas and throughout the north Atlantic, preferring cold and temperate waters. They are a bright blue-green along the top side of their bodies and a silver-white underbelly. They have up to 30 vertical, wavy bars that run along their sides and a horizontal line that runs from their pectoral fin to their tail. They eat squid, crustaceans like shrimp, copepods and krill and other fish.
  
  

Great Barracuda

• Great barracudas are a predatory fish that can grow up to 6.5 feet long and weigh up to 88 pounds. It is a tropical fish, found in both the Atlantic and Pacific Oceans. They prefer water temperatures that are around 75 degrees Fahrenheit. They have silver bodies with dark spots that are long and narrow, large, needle-like teeth and are agile swimmers. They are piscivorous, meaning that they eat fish, dolphins and even lizards.