goldfish are much more complicated than people think. they are still simple compared to other animals, but still need a 30 gallon tank, cool water, a filter, grave, and decorations. they can easily reach 10 years old and often live 15-20 years. the oldest pet goldfish ever lived to over 40 years old! they may be fish, but they are still living creatures that deserve more than a 1 gallon bowl with a single plant and no filter