Can you create the most harmonious aquarium? Each fish in the tank has its own action. On each turn you can either flip a fish card so that it swims (and its action goes) in the opposite direction - or you can perform its action to move fish and various features around the aquarium. Playing the 'feed the fish' card gives you a once-per-game special action, while a cat moves around the fish tank, acting as both a hindrance and a game timer. At the end of the game, if you have all of the aquarium’s features in the right place, and score enough points by getting fish of the same species swimming happily together, you win! —description from the designer