Once aboard the Nautilus you'll spend your time looking out of its massive viewing window where you'll be mesmerised by the fun sharks, squids and whales you can watch swimming around the reels.
However you may want to start your prize hunt by finding the maps and telescopes you'll need to find your way on your voyage and some harpoons just in case the sea-life get a bit frisky, prizes that pay up to 375 coins. Spotting sharks and whales will get you up to 500 coins, whilst electric fish will get you up to 625 coins, and giant squid up to 1,000 times.
Each spin of those wheels, whether a winning one or a losing one, will then move the Nautilus' pressure gauge into one of the bonus sections, which include Wild, Wild x2, Wild x3, Pressure Wilds, Clumped Wilds, Wild Reels and Bonus. If the Wild bonuses are triggered, the wild symbols will substitute for all base symbols, whilst if Wild x2 or Wild x3 are triggered all prize lines containing a wild will be multiplied respectively. Clumped Wilds will form clumps of wilds on the reels, whilst wild reels will see wild symbols hold on reels 1 and 3. If the bonus symbols trigger the bonus then you will receive a random amount of free spins, during which the giant squid may surface and grab a reel to turn it into a wild reel.