There are quite a few things to think about when it comes to the Fill the Boat Free Rounds Feature, so here's a look at how it plays out. Essentially, each reel has a metre attached to it showing the current level. This can range from zero to three. If the reading is higher than zero, the Fish Symbols will payout a cash prize. Next to this, every Scatter Symbol will award a free game and add a plus one to the reel level. But that's not all, every Golden Scatter Symbol will make the reel level max out and dish-up an additional free game!