Fish is a type of specie that is found in water bodies, and is a vertebrate with gills. There are over 29,000 varieties of fishes existing on this planet. They are found in fresh water or salt water. These varieties are divided into two categories of cold blooded, and warm blooded. Majority of the fishes are cold blooded, however there are few warm blooded fish such as shark, tuna, etc., which are feared. Other varieties of fish include clown fish, trout, goldfish, etc. Fishing is considered as a recreational activity as well as a profession. Many places around the world consume fish in their food. The most common edible fish are cod, salmon, anchovy, carp, tuna, trout, snapper, dogfish, etc. Sometimes people even enjoy eating raw fish. There are number of products that can be made of fish such as fish oil, etc. Fish oil is known to provide several health benefits and it also helps in reducing the risk of heart attacks, cholesterol levels, and help to reduce the discomforts faced by the patients of lupus, arthritis, colitis, and asthma. Staring at the fish swimming within a fish tank has been scientifically proven to calm the nerves of most people in today's fast paced world. It is also a well known fact that a fish tank with live fish swimming within provides for a soothing atmosphere to the room. These fishes are generally put in the tanks, which are generally made of glass. These tanks are filled with water, and they can even be decorated. Goldfish and tropical fish is a common variety of fish that most people enjoy having in their fish tank. Some places even have huge aquariums with exotic and rare species of fish for the common public to enjoy. A lot of manufacturers produce different varieties of products shaped as fish such as fish shaped soft toys, watches, sculptures, pottery items, clothes with fish images, etc. are very popular.