Curious what Mermaid Seas actually feels like to play? Here's our full, no-fluff take. Built by KA Gaming, it lands as a slot with very high variance and a published RTP of 96.61%. It's dressed up with an ocean and mermaid theme and plays out on 5 reels and 30 paylines. Originally released in 2018, it has aged well. If everything lines up, Mermaid Seas can pay up to 960,000x your bet. Let's break down what works and what doesn't.
Written by James Holloway · Last updated: March 2026
At its core, Mermaid Seas is a game produced by KA Gaming, leaning into an ocean and mermaid aesthetic and powered by 30 paylines across 5 reels. The result is a very high volatility profile paired with an RTP of 96.61%.
The mechanics are what make Mermaid Seas interesting. Look out for scatter symbols that unlock free spins and extra bonus rounds. With very high variance, this one is aimed at players who can ride out the swings for the top wins. Overall it's a well-rounded game that knows what it is.
With an RTP of 96.61%, this slot sits above the industry average of ~96%. Players can expect a solid return over extended play sessions, making it a good choice for value-conscious players.
Very high volatility delivers the most extreme payout profile — long dry spells punctuated by potentially massive wins. Only recommended for experienced players with substantial bankrolls and high risk tolerance.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Mermaid Seas features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
3.0 / 5 — Good
Mermaid Seas by KA Gaming is a solid offering that delivers good entertainment value. The 96.61% RTP combined with very high volatility creates a well-balanced gaming experience.