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.
Adult fish are more prone to rest on the aquarium substrate. These fish will require a minimum tank size of 25 gallons. The average lifespan of a Siamese algae eater is 5-7 years but they have been documented to live as long as 10 years.