The background is a deep blue ocean with bubbles floating up to the surface. The reel itself has a different shade of blue from the water in the background, with numbers from 1 to 20 appearing on both the left and right hand sides. Of course, it depends on how many lines you play. You can choose to play one, or use the full 20.
Wild is a killer whale. It can replace all symbols except scatter to help you form a paid win, and it can also be displayed as a stack, as described above. As we have already proven, the wild doubles pay for the victory. It's the portal for the game's 10,000 awards, but you need to include 10 icons on adjacent activity lines to declare it. For four whales, it is 2,500, three of them are 250, and two of them are worthy of 10.