You can customize your Firefox browser, and today I found one of an animated Goldfish. Try it, it's awesome! http://www.getpersonas.com/en-US/persona/75225
All you have to do is click "Wear This Persona". Don't worry, it's legit and official. I change mine all the time! So now you can constantly have a fish in front of you, even though it's not a Betta.