Fish is an aquarium simulator. It allows you to add fish to an underwater environment and customize them.
Fish show complex behavior. You can feed them, see their evolution as they grow, use different cameras to track them, and save different aquariums for later usage. Fish can be shared with others over the local network using Rendezvous.
What's new in Fish
Full screen anti-aliasing (FSAA). Stay on 1.4 if it's too slow on your mac.