Omega 3. Oily fish, such as herring, mackeral, salmon and bluefish, are one of the few nutritional sources of Omega-e polyunsaturated fatty acids, which help prevent heart disease and strokes and may help prevent some cancers and help minimize the symptoms of arthritis.

Largest. The largest fish is the whale shark Rhincodon typus), reaching 50 feet in length and found worldwide in tropical seas.

Smallest. The smallest fish is the 1/2-inch Goby (family Gobiidae) of the Philippines.

Outnumbered. There are more fish species on Earth than their are mammal or bird species. It's believed there may be 28,000 different fish species.

Best Stupid Fish Trick. The climbing perch, native to India, can walk on land in search of water when its water hole dries up.