Released: 4 Mar 2021

Prepare for a joyful fishing-themed slot action with Big Fin Bay by Thunderkick. This fishing bonanza might look like another retro nostalgia but wait until we reveal the win potential. Try to catch the mystery Wild, which transforms up to three reels on the grid or the expanding wild that can fill entire reels. Along with the free spins feature and respins, this slot might win you a fantastic 15,040x your bet. Let’s cast our bait while we explore the potential in our in-depth Big Fin Bay slot review.  

Big Fin Bay Slot

Big Fin Bay Slot Online

Thunderkick has challenged all fishing-themed slot games with Big Fin Bay, a modest yet quite powerful title that offers up to 117,649 ways to win. No, it’s not a Megaways mechanic, but it can be considering the expanding reel model. There’s not much when it comes to bonus rounds, as only wilds, free spins and retriggers are vital to trigger a big prize. Set across six reels with a minimum of 5,040 ways to win during the base game, you’ll land wilds, scatters and trigger free spins for a chance to win 15,040x your bet. The different configuration of rows per reel on any spin will leave you wondering whether you’ll be sailing on calm waters the whole time or there’s a potential excitement just beneath the surface. Let’s find out in our deep dive Big Fin Bay slot review.

About Big Fin Bay Slot 

The Big Fin Bay slot by Thunderkick is a fishing-themed addition that is stirring up all those previously released fish-themed slots. The reel action is set across 6 reels,040 ways to win, with a chance to expand up to 117,649 during bonus games. Packed with a few bonus features like expanding wilds and free spins, you wouldn’t assume that this game might win you an impressive 15,040x your bet.
Before you set the hook, you need to adjust your bets per spin, ranging anywhere between £0.10 and £100 per spin. The simple retro template and interface will easily allow you to set your preferences. To win, you need to land at least 3 symbols on adjacent reels. The only exception is the fisherman symbol, as you’ll need only 2 of those to form a win. If you’re a fan of the dynamic reel set and you’re after some fish-themed wins, let’s go behind the design and discover the symbols you’ll come across.  

Design, Symbols and Graphics 

The Big Fin Bay slot has a retro, classic feel regarding the design. As soon as you start the game, you’ll notice the worn-out, technicolour feels of the visuals. Thunderkick wanted to create a pleasant, light-hearted atmosphere where you can feel and smell the sea under your nostrils. The reels are set in front of a coastal landscape of the deep blue sea. Overall, the developer managed to deliver a dreamy summer mood in a place where you can relax and enjoy your pastime.
On the paytable, you’ll find classic A-10 royals and four fish symbols of a higher value. The highest-paid and premium symbol on the grid is the fisherman who can win you 7x your bet if you land 6 of those in combination. The golden marlin is the wild symbol, and once it’s included in a win, it expands and covers an entire reel. Finally, the bonus symbol is vital if you want to trigger the free spins round, giving you the option to play with up to 36 free spins.

RTP, Variance and Payouts for Big Fin Bay Slot 

The Big Fin Bay slot’s RTP (Return to Player) is set at 96.14%, which is straight up the industry average. Even though the model looks relatively simple, it’s quite high when it comes to variance. This means that wins won’t be that frequent but will be bigger once they occur. The maximum win you can take from this game is 15,040x your total stake in a single spin, which is impressive. If you want to find out more about different RTP and variance models, read our Variance, Volatility and RTP guide

Gameplay and Features on Big Fin Bay Slot 


When it comes to the Big Fin Bay slot’s bonus features, the overall action revolves around the expanding and mystery wilds. They can award respins and expand the size of the reels, giving you a chance to boost your winnings. Scatters trigger the Free Spins bonus feature for an option to spin the reels for free. Let’s explore their potential and see how they work in more detail: 

Mystery Wilds 

This type of wild symbol appears during the base game and can cover up to three reels completely wild. This action is known as the Mystery feature and helps you trigger a win. It’s worth mentioning that scatters won’t show up when this feature is active.

Expanding Wilds 

When a wild symbol forms a winning combination, you activate the Expanding Wilds feature. Then, the wild expands in size to fill the entire reel for a chance to boost your total. 

Bonus Games

This feature is active as soon as you land three or more anchor scatters anywhere on the reels. Every bonus scatters awards up to 6 free spins, so this means you can win up to 36 free spins. Here, wilds also play a vital role. Whenever they land on the grid, they’ll expand to cover the reel and trigger a respin. If the reels reach the maximum of 7 symbols in height, the game will win you 3 extra free spins to your total.   

Big Fin Bay Slot on Mobile 

The Big Fin Bay slot is HTML5 optimised, meaning it works seamlessly on any mobile device and any operating system. The design, layout, bonus features, and everything that is part of the game work without issues when playing on a smaller screen.

Other Thunderkick Slots 

Thunderkick is an independent slot game developer that progressed relatively quickly in the slot industry. It has become one of the suppliers that enjoy the reputation of an innovative studio that releases one of the most played online slots nowadays. Explore the beauty of the space for a chance to trigger a big prize with the futuristic title called Cosmic Voyager.  If you’re familiar with Crystal Quest: Deep Jungle slot and the famous Avalanche feature, you should check the follow-up title called Crystal Quest: Arcane Tower. Linked reels and wild explosions can offer you a chance to win up to 15,000x your bet.

SlotsWise Verdict 

As a conclusion of our Big Fin Bay slot review, we’re happy to test a highly volatile fish-themed title that owns the right math model for a chance to land you a big win.  Even though there isn’t much news regarding the in-game bonuses, they deliver the maximum potential to win, mostly the variations of wild symbols. All in all, this will surely be a competitive title among popular fish-themed slots.

Claim a welcome offer from this page and discover Big Fin Bay slot at top-rated online casinos.

Key Features
  • ProviderThunderkick
  • Reels6
  • Min Bet0.10
  • Max Payout15040.00x
  • RTP96.14
  • Paylines117649
  • Max Bet100.00
  • Bonus Rounds1
  • VarianceTBC
About The Author

Cvetanka Cvetanovska


Cvetanka is a gambling content specialist, closely following the latest legal and regulatory trends in iGaming. She has reviewed many online slots, finding retro and Egyptian-themed ones being her favourite. In her opinion, what makes one slot game to stand out are the design and bonuses, and she likes to test their potential. Contact Cvetanka

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