At first glance, a pet fish is a piece of cake. Yes, they are very chill pets compared to dogs and cats, but setting up their environment is where a lot of people flounder (lol!). For this reason, we rounded up the best pet fish based on how intense they are to take care of and how well they play with others. All of the fish on our list are freshwater fish; saltwater tanks are really meant for experienced aquarists. Fear not! Freshwater fish can be as colorful and exciting as exotic saltwater species. Most of the fish on our list are quite social and prefer living in a diverse aquatic community. Like any animal companion, the best pet fish is a happy pet fish.