To help you get in the swim of things, here's all you need to know about caring for your fine finned friends. If you're a first-time fishkeeper, we recommend fish that live in cold water, because they're easiest to care for. The common goldfish can live 10 to 20 years. This goldfish has a rounded body and two tail fins. Just like the name implies, this fish has super long, flowy fins.
Moors have big bug eyes.
Another hardy coldwater aquarium fish is the weather loach. This long, snakelike fish is brown or bronze with brown markings, and will grow to be three to four inches. More experienced caretakers can select fish that live in warm water. There are hundreds, if not thousands, of warmwater tropical fish sold as aquarium pets. The hardest, and most important, part is selecting fish that will do well in the same type of water conditions and will get along with each other.