Zombiquarium

Zombiquarium is a Mini-game unlocked by beating Adventure Mode and other Mini-games. In it you spend Sun to feed brains (up to three can be in the tank at a time) to Snorkel Zombies, which produce sun in turn. You can also use Sun to buy more zombies or to buy a trophy. You need 1000 Sun to win the level.

Strategy
Simply feed the zombies when they get hungry (they will turn green). If zombies have not been fed for a long enough time, they will die. Collect Sun and occasionally buy other zombies if you feel like it until you have enough Sun for the trophy.

Trivia

 * This Mini-game is based off of the game Insaniquarium, also by PopCap Games.