Mermaids Slot
Get 100 Free Spins when You Bet £20
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Mermaids Demo
Recommended Casino
3,000+
Up to 24 hours-
United Kingdom (UKGC)
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Mermaids Slot RTP, Details & Wager Limits
The Mermaids slot game keeps it straightforward with 5 reels, 3 rows, and 20 fixed paylines. Therefore, to win, you’ll need to line up matching symbols across any of these paylines, starting from the left.
To adjust your stake, hit the + or – signs beneath the reels or click directly on the bet amount to open up the configuration menu. You’ll find 12 options, starting from 10p up to £20, which is a solid range but could’ve used a bit more flexibility on the higher end, in my opinion.
If you’re playing from a non-UK Mermaids casino, you can access Autoplay, which lets you choose 20, 50, or 100 automatic spins. Set a loss limit to control your spending and a stop on win amount, meaning you can pause autoplay if your win exceeds a specific figure. And those who just want to speed things up can opt for quick spins or super quick spins.
The Mermaids RTP sits at 96.09%, slightly above the average you’ll find in most online slots. It’s got high volatility, so be ready for a bit of a wait between wins.
The Mermaids max win of 2,007x feels a bit on the low side compared to other slots out there. That said, it still holds its ground among the top RTP slots in UK online casinos, mainly thanks to its fun bonus features, which I got to try out in the free-to-play slots version.
Sure, I can see how that win potential might not satisfy high rollers, but if you’re in it for the gameplay, your best shot is to trigger the picker bonus, wild spins, and mermaid spins. Plus, it’s all about patience here—waiting for that perfect mix of symbols and bonus features to line up.
Theme: A Journey Through Sunken Worlds
The Mermaids slot game theme is all about the deep, mysterious ocean, where mermaids and sea creatures roam, with the visuals doing much of the storytelling. You’ve got vivid underwater scenes, jellyfish floating across the screen, and mermaids. Personally, I found it to be a nice balance—visually striking and immersive but not overwhelming or cluttered.
The audio does a good job of setting the mood. You’ve got the soft sounds of water in the background, and when you win or trigger something, the music and sound effects pick up, but it stays pretty low-key.
The symbols are a nice mix of classic and character-driven. The lower-paying ones are your usual cards—10, J, Q, K, and A—but they’ve been dressed up in seaweed and bubbles, with shades of purple and lilac to match the underwater theme.
The higher-paying ones include four different mermaids. Then there’s the regular wild wrapped in seaweed and the Progress Wilds, which come in blue, purple, and green with gold accents. It’s all tied together in a way that feels fresh and exciting—definitely a highlight for anyone looking to play new slots online.
Let’s break down the payout symbols and their worth:
| Symbol | Payout/Info |
|---|---|
 10 | 3, 4 or 5 = 0.1, 0.5 or 3 x stake |
 J | 3, 4 or 5 = 0.2, 1 or 5 x stake |
 Q | 3, 4 or 5 = 0.3, 1.5 or 10 x stake |
 K | 3, 4 or 5 = 0.4, 2 or 15 x stake |
 A | 3, 4 or 5 = 0.6, 3 or 20 x stake |
 White-Haired Mermaid | 3, 4 or 5 = 1, 5 or 30 x stake |
 Purple-Haired Mermaid | 3, 4 or 5 = 1.5, 7 or 40 x stake |
 Ginger Mermaid | 2, 3, 4 or 5 = 0.2, 2, 10 or 60 x stake |
 Blonde Mermaid | 2, 3, 4 or 5 = 0.5, 2.5, 20, or 100 x stake |
 Regular Wild | 5 = 100 x stake; substitutes all paying symbols |
 Progress Wilds | Purple Wild (15/15): Triggers Picker Bonus; Green Wild (30/30): Unlocks Wild Spins; Yellow Wild (60/60): Starts Mermaid Spins |
Mermaids Mobile
NetEnt is known for creating some of the best online casino slots for on-the-go play, and they’ve delivered again with Mermaids on mobile. Whether you’re diving in on a tablet or smartphone, the bold colours and simple features make it perfect for smaller screens.
The use of HTML5 tech ensures quick load times and smooth gameplay across iOS, Android, and Windows, so you can enjoy the game without a hitch when playing at mobile casinos.
Mermaids Bonus Features
Mermaids shine on the best online slot sites thanks to its 4 exciting bonus features. Besides the regular wild symbols, you’ve got 3 Progress Wilds that fill up their respective Progress Globes for special rewards. Once complete, you’ll trigger the Picker Bonus for multipliers or unlock two unique free spin rounds: Wild Spins and Mermaid Spins.
Let’s dive into what they each bring to the table:
Wild Symbols
Mermaids introduces four different wild symbols that can replace any paying symbol to create the best winning combinations: one regular wild and three Progress Wilds.
The Random Wilds feature adds between 2 to 6 wild symbols onto the reels during a spin, while the Progress Wilds each fill up their own Progress Globes, which lead to the activation of their respective special bonus feature when full, as follows:
Picker Bonus
The game begins with 10 Purple Progress Globes already collected, but the Picker Bonus feature only kicks off when you collect 15 Purple Progress Globes. Once activated, you get three picks from a selection of hidden bonus treasures with a random prize, which can be multipliers on your bet—ranging from 2x, 3x, 5x, 10x, 12x, 15x, 20x, 25x, or even 50x.
In addition to multipliers, your picks can also trigger one of two bonus rounds: Wild Spins or Mermaid Spins. If you activate one of these free spin rounds through the Picker Bonus, the Progress Globes for those features remain filled and do not reset.
However, the Progress Globe for the Picker Bonus will reset at the end of the bonus round, and you’ll need to start collecting the globes again for your next chance at this feature.
Wild Spins
The game also starts you off with 10 Green Progress Globes, and once you collect 30, you’ll get 10 free spins, during which the Random Wilds feature is active.
However, the Green Progress Wild symbols won’t appear while this feature is running, and the Progress Globe resets to zero after the round ends.
Mermaid Spins
You begin with 10 White Progress Globes. Collect 60 Globes, and you’ll unlock 10 free spins with Random Wilds and no low-paying symbols. Like the Wild Spins, White Progress Wild symbols don’t show up during this feature, and the Progress Globe resets to zero at the end of the round.
Mermaids Verdict: Gorgeous Design and Strong Features, But Lacking Big Wins
Mermaids delivers on the underwater visuals with a clean, immersive design, and the mermaid characters also add a bit of personality to the reels. The collection mechanic gives it a sense of progression, and the combination of Wild Spins, Picker Bonus, and Mermaid Spins adds solid variety to the gameplay.
Considering the mysterious aura of the mermaid theme, I came into the game expecting a large maximum win. However, the slot fell short at just 2,007x, which doesn’t really stack up in today’s market. Plus, the high volatility means you’ll be spinning for a while before you hit something worth celebrating.
Overall, it’s a rather lightweight title. For me, it’s more about the journey than the destination with this one. Try out the Mermaids demo for yourself and see what you think. Perhaps it still manages to bring some luck your way!
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Charlon is an accomplished iGaming professional with years of experience in the UK and Irish markets. If you need expert advice on online casinos and slots, he’s the one to turn to. His deep knowledge and insights into the industry make him a trusted resource for guidance and recommendations.
