Impossible to get pearls. Need 50 to open a slot and it goes up the more slots you open. Takes weeks to get enough pearls even with ads. Plus rarity doesn't work, no rare koi even though rarity is all the way up. So slow and hard to turn/control. You can tell the creator is greedy and just wants you to buy pearls. It's disappointing because it could be as great game but you need money to play it. You just swim around for weeks trying to get enough pearls it's horrible after a while