In the scientific method, Occam's razor is not considered an irrefutable principle of logic or a scientific result; the preference for simplicity in the scientific method is based on the falsifiability criterion.
Many freshwater fish average about 1 to 3 years of life. Some of the more popular species with this short life span include fantail guppies, swordtail platy, mollies, rainbow fish, hatchet fish, corydoras catfish, some cichlids, rasboras and tiger barbs. There are also several fish that live around 3 to 5 years, with proper care and feeding.
Silver Dollar s and Pacus also live 10 years or more, and the ever popular Convict cichlid can live 20 years. Reference List. Here is a reference with the expected lifespan of popular aquarium fish. These figures are simply an average. Keep in mind that with good care fish can live much longer.