The game is a realtime fish simulation with realtime learning artificial intelligence.
Build up a tank, start training and breeding your own fish and maybe some day, start defeating the big evil bossfish!
Earn money by advancing your breeding capabilities, improve your breeding grounds and unlock more valuable fish.

You'll see plenty of unbelievable fish interaction: Fish that start hunting, fleeing, cooperating. Some might learn to farm algae, other might start to bait less harmful fish... who knows..? There is no limit to the interaction of the fish and every evolution of species can bring new features. Make sure you select your fish carefully and only breed the fittest, so you can compete against the other fish.
It's up to you and your fish to cooperate with other players or just defeat them- but be warned: Your fish are getting intelligent. They might have their own will soon!