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Play the best mermaid slots and dive into an underwater world of jackpots, free spins, and top bonuses. Try classic 5-reel mermaid online slots from Rival Gaming, BetSoft, and Nucleus Gaming. We’ve even recommended a few of our hottest online casinos where you can play mermaid slots right now.
| Rank | Mermaid Slot | RTP% | Play Game At… |
|---|---|---|---|
| #1 | Cash Money Mermaids | 95% | Visit Bovada |
| #2 | Mermaid Royale | 95.92% | Visit OnlineCasinoGames |
| #3 | Under the Sea | 95.50% | Visit BetUS Casino |
| #4 | Mermaid’s Pearls | 96% | Visit El Royale Casino |
| #5 | Mermaid’s Treasure | 96.40% | Visit SportsBetting.ag |
| #6 | Mermaid’s Treasure: Book of Pearls – Hold & Win | 96.60% | Visit Las Atlantis Casino |
| #7 | Majestic Mermaid | 94.10% | Visit Café Casino |
| #8 | Mermaid Riches | 96.71% | Visit TrustDice |
| #9 | Mermaid Queen | 95% | Visit Slots.lv |
| #10 | Mermaid’s Bay | 95.64% | Visit TrustDice |
#1 – Cash Money Mermaids
- Where to Play: Bovada
- Developer: Betsoft
- Year Released: 2013
- Reels: 5×3
- Paylines: 25
- RTP%: 95%
Cash Money Mermaids tops our list of mermaid-themed slots for its bonus payouts. It’s a Betsoft slot, too, so you can be sure to enjoy exciting graphics and gameplay on every spin.
Cash Money Mermaids offers a new take on the standard mermaid slot machines elsewhere on this list. King Tune is a “gentleman of leisure” who oversees the bevy of beautiful mermaids in one of his nightclubs. The bartending octopus and seahorse bouncers round out this funky underwater adventure.
Bovada is your go-to casino for the best online slots and themed games. Plus, Cash Money Mermaids forms part of Bovada’s Hot Drop Jackpots range. Guaranteed jackpots drop every hour, day, or week when you play.
#2 – Mermaid Royale
- Where to Play: Visit OnlineCasinoGames
- Developer: RTG
- Year Released: 2022
- Reels: 5×3
- Paylines: 25 fixed
- RTP%: 95.92%
RTG’s Mermaid Royale earns a coveted #2 spot on our list for its bonus modifiers. Notably, the bonus tracker works like the one found in Megaways slots like Bonanza Megaways.
The special symbols are where most of the real action takes place. First, let’s talk about the wild symbol (conveniently labeled “wild”). If a wild symbol appears in the bonus row, it fills the reel below it with wilds.
And then there’s the scatter that serves different purposes, depending on its label (2x to 4x multiplier, 3 free games, 1 free game, etc.). A blank symbol only appears on the bonus row, as does the special scatter, which triggers free games.
#3 – Under the Sea
- Where to Play: Visit BetUS Casino
- Developer: Betsoft
- Year Released: 2012
- Reels: 5×3
- Paylines: 30 fixed
- RTP%: 95.50%
Under the Sea showcases Betsoft’s amazing 3D graphics and industry-leading gameplay. It looks like a cross between Disney’s The Little Mermaid film and Finding Nemo. Luckily, this 2012 mermaid slot plays as well as it looks.
Under the Sea wouldn’t join our top mermaid slots without a special symbol or two. Special symbols are the treasure chest (three of which trigger a pick’em bonus round) and the sunken ship. 3+ sunken ship symbols activate 15 free spins.
Plus, you may land wild oysters that substitute for regular symbols and apply a 5x multiplier to combos. However, it’s the pick’em bonus that delivers: open treasure chests and a final COLLECT symbol to gather the loot.
#4 – Mermaid’s Pearls
- Where to Play: Visit El Royale Casino
- Developer: RTG
- Year Released: 2019
- Reels: 5×5
- Paylines: 3125 ways to win
- RTP%: 96%
Mermaid’s Pearls from RTG offers more paylines if you hanker after bigger gameplay. You play 3125 ways to win on each spin. Plus, the set-up covers a 5×5 reel area, giving you more opportunities to land a winner.
Sultry mermaids are the name of the game in Mermaid’s Pearls. That’s why Mermaid’s Pearls probably deserves a spot on our list of the best adult slots to try online.
In addition, you win 10 free spins by collecting valuable pearls during base spins. The free spins only feature pearls, which apply multipliers to any winning play. Read our review of El Royale Casino now and try Mermaid’s Pearls for free.
#5 – Mermaid’s Treasure
- Where to Play: Visit Sportsbetting.ag
- Developer: Nucleus Gaming
- Year: Released: N/A
- Reels: 5×3
- Paylines: 30
- RTP%: 96.40%
Mermaid’s Treasure from Nucleus Gaming mixes the 3D graphics of Betsoft with lots of free spins action. In fact, there’s an uncanny resemblance between Mermaid’s Treasure and Betsoft’s Under the Sea slot.
The free spins bonus is another friendly comparison we can make between the two games. You trigger up to 15 free spins by hitting 3+ scatters during any spin. In addition, you can win gold by selecting treasure chests in the secondary bonus feature.
We recommend reading our Sportsbetting.ag review to see why it’s the place to go for mermaid online slots. Bet on sports, slots, or table games while you claim your first sign-up bonus at Sportsbetting.ag now.
#6 – Mermaid’s Treasure: Book of Pearls – Hold & Win
- Where to Play: Visit Las Atlantis Casino
- Developer: Nucleus Gaming
- Year Released: 2024
- Reels: 5×3
- Paylines: 10 fixed
- RTP%: 96.60%
Mermaid’s Treasure: Book of Pearls – Hold & Win is the sumptuous sequel to one of Nucleus Gaming’s best-loved slots. It’s a 5-reel mermaid online slot featuring four beautiful sirens of the sea.
You trigger Hold & Win with 6+ scatters in any position on the reels. You re-spin the reels, with each prize symbol locking in place while the remaining reel positions spin. The game pays out the total cash displayed once all reel positions have locked.
With 20 free spins, there are even more ways to win in Mermaid’s Treasure: Book of Pearls – Hold & Win. Give our review of Las Atlantis Casino a read and join the casino today.
#7 – Majestic Mermaid
- Where to Play: Visit Café Casino
- Developer: Rival Gaming
- Year Released: 2023
- Reels: 5×3
- Paylines: 1024 ways to win
- RTP%: 94.10%
Rival Gaming’s Majestic Mermaid was only released in 2023. However, its 1024-ways-to-win format and Lock & Load bonus have proved a hit with players. That’s despite a relatively low RTP in this mermaid slot of 94.10%.
You trigger the re-spin feature by landing two bonus scatters in any position. This gives you another bite of the cherry to trigger the main bonus feature.
You activate the Lock & Load bonus with 3+ treasure chests. Enjoy re-spins with prize symbols and power-ups that increase the possible payouts. Read our review of Café Casino and see why it’s the #1 place to play Majestic Mermaid now.
#8 – Mermaid Riches
- Where to Play: Visit TrustDice Casino
- Developer: PG Soft
- Year Released: 2021
- Reels: 5×5
- Paylines: 120
- RTP%: 96.71%
Mermaid Riches is one of the top slots from PG Soft. It’s a mermaid slot machine that’s perfectly designed for mobile gambling apps on smartphones or tablets. You can play in portrait mode or spin the reels in landscape format to win prizes.
The reel layout is similar to the staggered set-up seen in games like Zeus III from WMS. Paylines run left-to-right. However, reel 1 features one position, reel 2 two positions, and so on.
Sticky wilds come into play when you try Mermaid Riches. The wilds move to random reel positions and have multipliers attached. You can also trigger boosted free spins when you play.
#9 – Mermaid Queen
- Where to Play: Visit Slots.lv
- Developer: RTG
- Year Released: 2011
- Reels: 5×3
- Paylines: 20 fixed
- RTP%: 95%
Mermaid Queen is one of the simpler mermaid-themed slots on our list. It’s a standard 5-reel slot from RTG with 20 fixed paylines, wilds, and scatters.
You activate the Mermaid Queen feature by landing 3 scatters anywhere on reels 1, 3, and 5. The feature begins with 10 free spins, with all wins doubled. Plus, you win additional free spins by landing a clam scatter anywhere.
The standard payline structure and free spins bonus may not blow you away. However, this mermaid slot machine stands out for its progressive jackpot.
The game’s progressive jackpot triggers randomly on any spin. Therefore, you stand a chance to bank a progressive, regardless of your stake.
#10 – Mermaid’s Bay
- Where to Play: Visit TrustDice
- Developer: Mascot Gaming
- Year Released: 2019
- Reels: 5×3
- Paylines: 25
- RTP%: 95.64%
Mermaid’s Bay is one of the top slots at TrustDice for sultry graphics and generous bonus features. However, TrustDice offers several mermaid online slots to play in demo or real-money formats.
Wild symbols play a major part in Mermaid’s Bay. Wilds can appear in both the main game and free spins. Plus, wilds randomly transform into other symbols and trigger random modifiers.
For example, the Blonde Mermaid becomes a wild reel with a 1x multiplier (2x in the free spins). The Brunette Mermaid triggers a wild multiplier and free re-spins with sticky wilds. You may also land regular wilds with a 2x multiplier applied.
Finding the Best Mermaid Slot Games Online
The top mermaid slot games offer free spins, big jackpots, and sumptuous graphics. You can enjoy the best 3D graphics while playing online or through your smartphone. Plus, all of our top-rated online casinos offer at least one mermaid slot machine to play.
Ready to hit the best casinos to play mermaid slots now? Play Cash Money Mermaids today at Bovada Casino.
Not only is Cash Money Mermaids a great all-around slot with generous bonuses and returns. You can also jump into the Bovada Rewards scheme to earn points every time you gamble.
