Each time you level up you will receive a key. Keys can be used to unlock more space in your reef. Tap the space you want to unlock and then tap the locked area and drag your key to the keyhole to unlock more space for your fish!
Each time you level up you will receive a key. Keys can be used to unlock more space in your reef. Tap the space you want to unlock and then tap the locked area and drag your key to the keyhole to unlock more space for your fish!