betta fish survive for one year

Though they are not very active like guppies, goldfish, tetras, the betta fish are extremely hardy and can survive for a long period of time in a fish bowl with almost no maintenance and other feeding and changing the water.
A red betta fighter fish was purchased in August 2016, and it has survived for one year, without any major problem in a 4 inch bowl. Almost all other kinds of fish like gold fish, guppies, mollies, neon tetra fish, platys, sucker fish have died within a year, though they were in a larger fish bowl.

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