Ecosystem: Coral Reef, is a card drafting game where the players are choosing cards and placing them into their play area turn by turn. The cards in a player's grid make up their own personal marine ecosystem, and the player who has the most efficient ecosystem will be the winner. Each player's ending play area will consist of 20 cards, and there are 11 different card types in Ecosystem. The possibilities are nearly endless. Just don't forget to diversify! Ages 8+ Each player's ending play area will consist of 20 cards, and there are 11 different card types in Ecosystem. The possibilities are nearly endless. Just don't forget to diversify! Ages 8+