I just got your aquarium and unlocked the Yellow Piranhas!
Also Joyo helped me unlocked some Sea Horses! Whee! I also learned how to change my tank size, so now I got a small tank for the tiny fishies.
And thank you so much for your Mii! I love associating people with their Miis and I have sent you mines! And to those who doesn't have a Mii represented will have a scary blank face instead... Speaking of which, Joyo, could you send me your Mii?