Mermaid Queen is a five reel online slot by RealTime Gaming that features a progressive jackpot as well as a wild symbol and free spins. It has a big wagering margin from 0.1 all the way up to 5 for coin values, and all of the twenty five lines are optional. This will appeal to players of lower budgets as they can spin for as little as one cent or as much as 125 for all of the lines. Mermaid Queen has a number of special features, such as a wild symbol, a scatter symbol that launches free spins and a progressive jackpot.