Crystal Waters slots feature stacked wild multipliers, free spin bonus rounds and discrete wins. Not only can you use Dolphin wild to complete the winning combination, but you can also double your bonus. Although it only appears on the second and fourth reels, it is stacked to help put a lot of coins in the pocket. However, you can't use Dolphin Wild to unlock free spins because it can't replace scattering.
The yacht symbol is scattered. If you create a scatter plot combination anywhere on the reels, you can win up to 200 times the bet amount. To unlock the free spin, you need to get at least 3 yacht symbols on your reels. Once you trigger a free spin, you will get 15 free spins and add some wildness in the form of an angel fish symbol. If you put this symbol on the third reel during free spin, it will act as a wildcard and double your bonus to x8.