I got my first fish a year ago and he is inadvisable! We rent out a house and the people who moved left him for 2 days and we brought him home and he still is fine :D
I won a small little goldfish at a festival about 2 years ago and my family put it into our pond with the rest of our fish and it got FREAKING HUGE (still alive though).
Its 13 Now & basically quadrupled in size.