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Bonus Bubbles


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Bonus Bubbles Online Slots

It’s time to get wet ‘n’ wild with this fintastic seaside soiree of a online slots game from Mr Spin Online Casino. Bonus Bubbles won’t leave you feeling washed up… in fact, you could be squids in as there’s a treasure trove of multipliers to be won. Whalecome, to our watery wonderland.

Bonus Bubbles features 15 win lines, a mini-game with mega multipliers up for grabs, and the huge progressive Mega Jackpot on offer. Can you make a splash with this Mr Spin exclusive online slots game?

If you dive beneath the surface, there’s a whole watery world for you to discover in this crabby caper. Will you net the buried treasure and swim your way to a turtleriffic win? Will the tide be on your side and drift you towards that progressive Mega Jackpot? Dive in today, and see if Bonus Bubbles can float your boat.

Bonus Bubbles Online Slots Index

Getting Started

Life’s a beach with Bonus Bubbles, and Mr Spin’s made it as easy as one, two, sea to play this exclusive online slots game. To start, tap ‘Bet/Lines’ button and use the ‘+’ and ‘-‘ buttons to increase or decrease your total bet and the number on win lines you’re playing on. Ready to play? Just tap the spin button and watch those bubbles burst into life.

Your cost-per-spin amount is calculated by multiplying your bet amount to the number of win lines you choose to play on. This means you can swim to your own tuna with Bonus Bubbles and set your bet to suit you. For example, a 50p bet on 5 of our fin lines would result in a total bet of £2.50. Or betting £1 on all 15 lines, would see your total bet amount total £15

Want to dip your toes in? The minimum bet on this game is a mini-school 2p a line, while the maximum is £20 a line.

How to Play

Beachy keen to get playing? Set your bet amount, tap the spin button and watch the tide roll in and stop at random.

When you line up a winning combination of crustaceans and critters on an active winline to be in for somefin special, with Bonus Bubbles wins calculated from left to right! What those winning combinations are depends on the symbols, with some paying out with a 2+ combination and others with 3 or more. Any on-reel winnings will be highlighted on screen before they’re added to your total credit.

Reel Wins

You’d be cray-sea to miss out on Bonus Bubbles as you’ll get a fintastic multiplier of your bet per line for each winning. This will depend on the symbols lined up, so press the menu button and tap ‘Paytable’ to view all of the winning combinations and their multipliers. All wins across multiple lines combine to form your total win, and only the highest win counts on each line.

Wild Symbols

You’re shore to love when our Wild symbols wash up on your win lines, as they substitute for every symbol except the mini-game and Free Spins symbols, helping to make a swimming combination!

For example, line up two K clownfish and a Wild to shellebrate a win that is the equivalent of three of the K symbols.


There’s no time for clownfishing around in the mini-game, Fish Feed. Spin 2 or more symbols on any of the 15 active win lines to enter. The game itself is simple: spin the reels to feed the fish and build up those multipliers.

You enter the game with three spins, but can win extra ones in the mini-game depending on if the tide is on your side. Land on an “x” symbol though, and you don’t win a multiplier on that specific reel. Fish Feed will end after a player has used all of the awarded bonus spins. Can you make a splash and maximise your multipliers?

Gamble Feature

Whenever you have a feature win in Bonus Bubbles online slots, you’ll have the opportunity to dive on in to the gamble feature or stick with your current win. This feature gives you the chance to boost your winnings – or lose the lot. You cannot enter this feature with a Mega Jackpot win, or any win over £1000.

Free Spins

You’ll make a splash if you line up three or more Free Spins symbols!

3x free spin symbols gives you 5 free spins, 4x symbols will give you 7 free spins, and 5x symbols will see you bagging 9 free spins! These free spins will lock to the same value of your last spin.

Dive in to even more free spins if you’re a fresh fish at Mr Spin’s Casino! Every new player can receive  up to £3 worth up to 50 Free Spins as a casino welcome bonus* Play your bonus on one of Mr Spin’s amazing games, such as Reel Lucky Spins and Shrunken Trails, with as little as 0.06p per spin! Mr Spin also could give you an up to 100% first deposit match up to £100**!

*18+. New Players only. Free Spins awarded as bonus credits. Up to £3 bonus credit. The max win of £3 bonus credit from the Lobby Game can be used for 50 spins at £0.06 per spin. Win paid as bonus credit. 40x wagering requirement. 7 day expiry. £50 Max withdrawal from bonus win. T&Cs apply. BeGambleAware.org
**18+. New Players only. Up to 100% deposit match of first deposit awarded as bonus credit via lobby game. Max bonus £100. 40x wagering requirement. 30 days to claim. 7 day expiry. Min deposit £3. Withdrawal of deposit excludes player. T&Cs apply. BeGambleAware.org

Progressive Mega Jackpot

The occurrence of “JACKPOT” symbols filling an active win line awards the progressive Mega Jackpot. The progressive Mega Jackpot is available on any bet, with 0.025% of the bet being added to the progressive pots. Half of the value gets added to the current jackpot, and half to a reserve pot ready for the next winner.

When the Jackpot is won, it is reset and begins to rise again. Simultaneous wins can occur. If a player wins the progressive Mega Jackpot then a notification would occur BEFORE any other player was awarded the Jackpot. Any players in a game that contributes to that same Mega Jackpot will receive the on-screen notification of a reset the next time they press the spin button if it is within 10 minutes of the jackpot being won. Players will not be charged for the spin generating this notification.

The Mega Jackpot guaranteed starting value is £100,000, with even higher starting prizes possible with a built up reserve pot. The Mega Jackpot promotional pot system is available over any stake on any participating game plugged into the Mega Jackpot promotional pot.

In the event of a communication error after a progressive win result has been determined and before it has been displayed on screen, the win amount will automatically be transferred to the player’s account. While the game is live, the Jackpots cannot be terminated.

Payout Information and Game Rules

Bonus Bubbles has a theoretical return to player of 92.19%. This is based on long term playback. System malfunctions void all payments.

Monies are staked in the following order: winnings, player deposits, bonus credit.

Mr Spin general T&Cs apply.

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