Considering a pet fish for your kids? Don’t fret – we’ve got you covered! Here are the easy steps to buy a pet fish at PetSmart. This is a partnered post with PetSmart. All opinions are my own. Now that our youngest is starting school, we wanted to offer him some more responsibility. After all, he is a “big boy” now. So we went fishing for the perfect pet – a Male Betta from PetSmart!