pet fish lifespan
Like the goldfish, or any fish, make sure you know how big your species will get and plan accordingly. Mollies live 3-5 years. Tetras live up to 10 years despite being tiny. Those are just a handful of popular pet species.
This completely depends on the species of fish. Goldfish will live 20-30 years and grow to be a foot long, if you let them. Most die within a few years because people don't look after them well. Fish need bigger tanks as they grow; it is a common misconception that fish only grow to the size of their container.