Play for payouts of up to 9,000x your bet in Manta Mayhem, a 5x3 slot with 20 fixed paylines. Trigger the Clam the Prize pick feature to win up to 10 free spins with Boosters available, including prize multipliers and Sticky Wilds. What else can you expect to discover in this slot? Read our Manta Mayhem review to find out.



Manta Mayhem plays out on a 5x3 grid with 20 fixed paylines. On any spin, you can create winning combinations with three, four, or five identical standard symbols on a payline. Special symbols can also hit the reels and perform helpful actions, which I’ll cover later in our Manta Mayhem review.
You can choose from several betting options at UK online casinos, ranging from £0.10 to £5.00 (for adults aged 25 and over). Players outside the UK can bet up to £100 instead.
The slot game has a theoretical RTP of 96.20%, which is above the industry average, and it’s highly volatile. The maximum possible win is 9,000x your bet, and the bonus features can give you a chance to pick up some of the bigger payouts.
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While slots set under the sea tend to feature the same creature types, it’s refreshing to see a manta take the lead. And the manta is brilliantly designed, well animated, and adorable. As you play, the manta floats behind the reels, flapping its pectoral fins and blinking its big eyes.
The music is sweet, playful, and whimsical, which is a great fit for the manta’s design. As for the symbols, you’ll see squid, prawns, and fish, as well as coral formed into classic royals (10 to Ace).
However, the basic symbol values are low without multipliers. The most valuable symbol overall is the standard Wild, worth up to 20x your bet.

10
3: 0.30x bet / 4: 0.40x bet / 5: 0.80x bet

Queen
3: 0.40x bet / 4: 0.70x bet / 5: 1.50x bet

King
3: 0.50x bet / 4: 1x bet / 5: 2x bet

Ace
3: 0.60x bet / 4: 1.20x bet / 5: 2.50x bet

Prawn
3: 0.80x bet / 4: 1.50x bet / 5: 4x bet

Red Fish
3: 2.50x bet / 4: 5x bet / 5: 10x bet

Wild
3: 4x bet / 4: 7.50x bet / 5: 20x bet
Manta Mayhem has been designed for mobile and uses HTML5 technology for a seamless experience across devices. Whether you play on a tablet or phone, the graphics have the same eye-catching colours and fluid animation. The interface adjusts to different screen orientations, suitable for playing in portrait and landscape.



In the base game, you can trigger the Clam the Prize pick feature and the Free Spins round with boosters.
The Wild symbol substitutes for every other symbol except Scatters.

The Sticky Wild can land on reels 2 to 4 as a Booster in the Free Spins round. Sticky Wilds stay locked in position until the Free Spins feature ends, and they substitute for all non-Scatter symbols.

HP Wilds come into play during the Free Spins feature when awarded as a Booster. Just one HP Wild is picked at random to appear in the round, and they pay the same prizes as the standard Wild. HP Wilds also substitute for all non-Scatter symbols.
The pearl Scatter can land once per reel in the base game only. Each pearl Scatter is collected by the Manta Ray, and they may randomly trigger the Clam the Prize feature during collection.

If you collect a pearl Scatter and trigger the Clam the Prize feature, you need to pick one of three clams. Clams reveal the number of free spins and Boosters awarded. Possible awards are 6 free spins with 3 boosters, 8 free spins with 4 boosters, and 10 free spins with 5 boosters.

Once the Clam the Prize feature ends, the Free Spins round begins. The Boosters you receive are active for the entire feature.
The Boosters available include extra free spins, stacked high-paying symbols, Sticky Wilds on one or more reels, and random Wild placements. But one of the best Boosters is the multiplier, which could boost all wins by x2, x5, or x10.

If you’re looking for a slot with a relaxing ambience, colourful graphics, and simple features, Manta Mayhem may fit the bill. It presents a fresh approach to the well-worn undersea setting, with a cute manta and other creatures you don’t see in slots too often.
The game has an average RTP and a solid top prize of 9,000x your bet too. But the volatility is high and the standard symbol values are low, so hooking the more generous wins may take some time.
The Clam the Prize and Free Spins features work well together, and the Boosters can add variety while helping you line up wins.
Manta Mayhem is entertaining and includes Play’n GO’s usual polish, and it’s probably best suited to casual players.
Rating: 8.0
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