To secure the underwater wins, one of the following game features would need to be triggered:
Roaming Wilds – Every time a WILD symbol lands in the base game, it pays and remains in place on the screen. When the next spin takes place, the WILD will switch position from its current location to one position up towards the top of the screen; from here, it will leave the screen entirely. If the bet has been adjusted with WILDS on the screen, it will remove the symbols from the screen and the next spin, meaning the round will begin without the Roaming WILDS.
Free Spins Feature – Land a total of 3,4 or 5 SCATTER symbols within the base game to unlock 6,9 or 12 Free Spins. When a WILD symbol hits during the Free Spins Feature, it will trigger another respin. The respin session will continue free of charge, moving all WILD upwards on the screen, awarding the wins between every respin. This process continues until all WILD symbols have disappeared from the screen. Every time the respin is triggered, a multiplier of 1x will be added until the end of the respin, and then it will reset when the spin has ended. Hit three or more SCATTER symbols during the round and earn five additional Free Spins to retrigger the feature.