If you want to make your fancy new iPod or iPhone do something attractive and relaxing while docked (maybe to keep the screen from locking), you might check out iQuarium. The free version includes new updates for Retina graphics, AI improvements, and stability tweaks. The app is currently at 3 stars, and has taken some heat for not loading the fish for previous free users. Check it out here...

iQuarium
I just got a shipwreck background!
WOW!
Is that the free version? I still only have a single yellow fish, a rock and a plant? You must play alot...
Your aquarium is awesome...I'm jealous...
iQuarium