Big Fin Bay Slot Review

⭐ 8/10
Create by: Thunderkick
Review by:
Posts by Michael White
Updated: November 29, 2025

Big Fin Bay is a High volatile slot from Thunderkick with an RTP 96.14% and up to x15040 maximum win. Play demo for free.

Big Fin Bay Slot Demo

Software
Release Date
2021-03-31
RTP
96.14%
Max Win
x15040
Volatility
High
Bet Range ($,€,£)
0.10 - 100
Number of Reels
6
Betways
5040 - 117649
Features
Expanding Reels, Expanding Wilds, Fishing, Mystery Symbols, Nature, Respins

Big Fin Bay Slot Stats

Big Fin Bay runs on a 6 reel set up where each spin throws up between two and seven symbols per reel, giving a fixed 5,040 ways in the base game. Stakes start at ten pence and go up to one hundred pounds a spin, which suits both grinders and high rollers. The RTP sits at 96.14 per cent and the game is highly volatile with a 15,040 times stake max win.

Where Big Fin Bay really opens up is in the bonus, when the reels stretch towards the full seven high and pay ways can reach 117,649. There is no feature buy, so you grind it out the old way and hope the scatters land before the balance disappears. From my sessions the slot can feel quite streaky, with long dry spells broken by the odd chunky hit when expanding wilds line up.

Big Fin Bay slot screenshot

How to Play Big Fin Bay Free Demo Slot

Thunderkick keep the set up in Big Fin Bay nice and clean, so even in demo mode it takes seconds to get going. I load the slot, open the bet selector and pick a stake level that would feel sensible in real money, then hit spin. The control panel also has turbo and sound toggles, so you can tweak the pace and atmosphere before you start your fishing session properly.

When I test a new release like Big Fin Bay I often use autoplay in demo to get a feel for the hit rate. You choose a number of spins, set loss and win limits, then sit back while the reels do their thing. It is a good way to see how often the Mystery Wild feature shows, how quickly the bonus seems to arrive and how punishing the downswings can be.

How to Play Big Fin Bay Quick Tips

In live play Big Fin Bay is straightforward. First, pick a bet that fits your bankroll, as the high volatility can chew through funds. Then spin manually or set a small autoplay block and watch for stacked fish or fishermen on the leftmost reels. I like to stop autospins after any sizeable hit or when two scatters land, as the game often feels like it can tease features in clusters.

Winning Combinations & Payouts in Big Fin Bay

Big Fin Bay uses a mix of card ranks and fishing icons on the reels. The low pays are nines through aces, while the premiums are four different fish and the fisherman himself. Wins form from left to right on adjacent reels, with three or more matching symbols needed, except the fisherman who pays from two of a kind. Low symbols pay around 0.3 to 1 times stake for six, premiums rise to seven times.

On paper those line wins look modest, but Big Fin Bay is all about volume of ways and multiplying hits through stacked symbols and expanding wilds. Full reels of the same fish across several columns can add up quickly, especially once the reels have grown in the bonus. In my experience, most base game returns come from clusters of mid level wins in a single spin rather than one monster combination.

Symbols and Paytable

Symbol Quantity Payout
icon 1 6 x7
5 x4
4 x3
3 x2
2 x1
icon 2 6 x3.2
5 x2.2
4 x1.5
3 x1
icon 3 6 x3
5 x2
4 x1.4
3 x1
icon 4 6 x2.2
5 x1.4
4 x1.2
3 x0.8
icon 5 6 x2
5 x1.2
4 x1
3 x0.8
icon 6 6 x1.5
5 x1
4 x0.6
3 x0.4
icon 7 6 x1.4
5 x0.7
4 x0.6
3 x0.4
icon 8 6 x1.2
5 x0.6
4 x0.5
3 x0.3
icon 9 6 x1
5 x0.5
4 x0.4
3 x0.3
icon 10 6 x0.8
5 x0.5
4 x0.4
3 x0.3
icon 11 6 x0.8
5 x0.5
4 x0.4
3 x0.3
icon 12 Wild
icon 13 Scatter

Big Fin Bay Special Symbols

Beyond the standard paytable, Big Fin Bay leans heavily on its two special symbols. The Golden Marlin wild appears on all six reels and substitutes for anything except scatters, helping to connect those tricky five or six reel fish wins. The Anchor scatter is the ticket into the free spins, and seeing three or more anchors drop in one spin is where the slot really starts to show what it can do.

The wilds in Big Fin Bay have a neat twist. Any time a wild takes part in a winning combination it stretches to cover the whole reel, often pulling extra ways into play. On top of that there is the random Mystery Wild feature, which can turn up to three full reels wild on any spin. Those moments are usually when the base game actually wakes up and throws some respectable totals around.

Anchor scatters have their own quirk. It is not just how many scatters you land, but the reels they appear on, because each scatter reel awards between one and six free spins. In the best case you can walk into the bonus with thirty six spins queued up and a very mixed set of reel heights. That randomness keeps the build up fresh, and I find it adds a nice layer of anticipation.

Big Fin Bay Bonus Game

The bonus game in Big Fin Bay is where the maths model really kicks off. During free spins, every time a wild lands and helps a win it expands to fill the reel and then triggers a respin. Before that respin starts, an extra symbol is added to that reel, effectively growing it taller. Reels never shrink during the feature, so you can slowly build towards seven high columns and a huge number of ways.

Each reel that reaches the full seven symbols tall throws in three extra free spins, so the feature can go on for quite a while when things fall right. Maxed out you get 117,649 ways, stacked fish and marlin wilds everywhere, and that is where the 15,040 times stake potential sits. In reality I usually end up somewhere in the middle, with a few reels grown and a bonus worth fifty to two hundred times.

Big Fin Bay slot screenshot

Big Fin Bay Final Thoughts

For me Big Fin Bay hits a nice spot between old school fishing graphics and modern ways mechanics. The base game can drag, so it suits players who enjoy chasing weighty bonuses rather than constant small hits. When the wilds behave and the reels stretch, the slot feels capable of something serious, but you need a steady bankroll and a bit of patience to see it at its lively best.

Screenshots

Big Fin Bay slot screenshot 1
Big Fin Bay slot screenshot 2
Big Fin Bay slot screenshot 3
Big Fin Bay slot screenshot 4
Big Fin Bay slot screenshot 5
Big Fin Bay Final Ratings
Theme & Symbols








Sounds & Music








Bonus Features








RTP (96.14%)








Max Win (x15040)








Originality








FAQs About Big Fin Bay

Can I play Big Fin Bay free slot?

Absolutely! You can enjoy Big Fin Bay for free on our website without registration. Our partner casinos of Thunderkick also usually offer demo mode access.

Can I win real money on Big Fin Bay slot?

Yes, to win real money in Big Fin Bay, you'll need to create an account at a licensed casino site. You can then play for real and win up to x15040.

Can I play Big Fin Bay slot on mobile phone?

Yes, Big Fin Bay is fully optimized for mobile devices and runs smoothly on any devices.

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