The purple gem is the wild symbol, it can substitute for all the other symbols, except the scatter symbol, to help and form winning combinations.
The mermaid is the scatter symbol and she is the key to one of the slot’s bonus features.
When the mermaid lands she will payout her paytable value multiplied by the number of times she appears on the reels. When two or three mermaid symbols land on consecutive reels starting from the first, and one of the symbols has a silver frame, then every mermaid symbol will expand to become 2x1 in size and award you more wins. If three or four land on consecutive reels and one has a gold frame then they expand to 2x2 in size, if four symbols land on consecutive reels and two have gold frames then they expand and combine to give you a 5x3 symbol and cover the entire reel set. This then pays out a massive 250 times your total bet.
The slot also offers three wild bonus features. On any spin, a ray of light can move across the middle reels to turn one of the reels entirely wild. The wild reel then locks in place for a free respin. The ray of light will then appear again and it can turn another reel wild and award another respin. If you are lucky it will happen a third time and you will have a spin with the middle three reels entirely wild.
After any spin, a fortune wheel can appear and spin to award you extra wild symbols. You can win 2, 4, 6 or 9 extra wilds and the wilds are then added in a 2x1, 2x2, 2x3 or 3x3 block on the 3 middle reels.
Finally, on any spin three extra wilds can be added to the middle three reels. They will then lock in place for a free respin. Then another three wilds are added to the reels for a free respin, and it will then happen a third time. The wilds can overlap, but if they don’t then you will have three completely wild reels.
Charms of the Sea offers a top payout of 10,000x for landing five wild symbols along a payline. The octopus can payout up to 750x, the crap up to 400x, and the fish and the seahorse can both payout up to 200x.