Big Bass Bonanza Slot Review

RTP: 96.71%

Provider: Pragmatic Play

Best casinos: TheVic, HeySpin, LeoVegas Casino, All British Casino, Kwiff Casino

Big Bass Bonanza Key Features

RTP: 96.71%

Provider: Pragmatic Play

Volatility: Medium to High

Theme: Fishing

Reel style: 5

Paylines: 10

Stakes: 10p to £250

Max Win: 2,100 x bet


Free Spins



Fish up the biggest wins with the Big Bass Bonanza slot. This 5 reel, 10 payline title from Pragmatic Play is one of the most popular slot games in the UK due to its simple gameplay. In the base game, it’s just payout wins on offer.

In the Free Spins feature, Fisherman Wilds collect Fish Money symbol values. They are also collected in a meter which leads to retriggers that award extra free spins and an increased multiplier of up to 10x. There is a random Dynmate feature which transforms random symbols in Fish Money symbols when 1 Fisherman Wild appears.

With a high 96.71% RTP rate and 2,100 times bet max wins, Big Bass Bonanza features in many free spins offers at UK slot sites. Find out what all the fuss is about in our Big Bass Bonanza review.

Casinos that offer Big Bass Bonanza slot sorted by RTP

Wager on any slot & get 200 Real Money Free Spins!

  • Wagering req. 0x
  • Value/free spin £0.10
  • Offer amount £20
New customers only, wager £20 on slots and get 40 cash free spins for 5 consecutive days. £20 stake on slots each day within 5 days of 1st deposit to qualify. £0.1 spins on Book of Dead. £250 total max withdrawal. Full T&Cs apply.
#ad. 18+,, T&Cs Apply

100% up to £200 + 100 FREE Spins

  • Wagering req. 50x
  • Value/free spin £0.10
  • Offer amount £200
18+, T&Cs apply. New reg only. Opt in & deposit £10, £50 or £100 within 14 days & further 7 days to wager cash stakes 50x to unlock reward (up to £200 on first deposit). Wagering/game contributions vary. Up to 100 free spins x10p added to Big Bass Splash after depositing & wagering, 3 day expiry
#ad. 18+,, T&Cs Apply

100% up to £100 + Always 10% Cashback!

  • Wagering req. 35x
  • Value/free spin -
  • Offer amount £100
#AD New customers only, min deposit £20, wagering 35x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Full T&C’s apply
#ad. 18+,, T&Cs Apply

100% Bonus Up to £50 + 100 Spins

  • Wagering req. 35x
  • Value/free spin £0.10
  • Offer amount £60
18+. New Players Only. Min. deposit £20. Max bonus allowed is £50. Offer duration upon receiving is valid for 2 weeks (14 days). Max Win from spins is £100. 35x wagering applies both for bonus and spins part. Spins are credited on specific games(Starburst). Spins expire after 24 hours if unused. Full T&Cs Apply.
#ad. 18+,, T&Cs Apply

Up to £200 Bonus + 100 Free Spins

  • Wagering req. 35x
  • Value/free spin £0.10
  • Offer amount £210
Welcome bonus package on first 3 deposits 1st Dep. Min £20. 50x wagering (bonus & deposit). max bonus to cash 5x. 20 Free spins. 35x wagering. Max bonus to cash £30. Claim once. See full T&Cs for 2nd & 3rd Deposit offers. Full T&C's apply.
#ad. 18+,, T&Cs Apply

Free Spins Offers

Due to its popularity, there are plenty of Big Bass Bonanza free spins offers available at licensed UK casinos and slot sites. Below, we’ve listed 9 Big Bass Bonanza promotions you can claim:

Casino SiteOffer
Vegas Kings
50 Big Bass Bonanza cash spins (min deposit + stake £20)
Dream Jackpot
50 Big Bass Bonanza extra spins (on 1st deposit)
50 Big Bass Bonanza free spins (stake £10)
Betway Casino
125 Big Bass Bonanza free spins (stake £10)
666 Casino
100% Bonus up to £66 + 66 Big Bass Bonanza extra spins
Up to £250 Welcome Bonus + 100 Yoo Spins (20 on Big Bass Bonanza)
Hollywood Bets
Stake £10 and get 100 free spins (50 on Big Bass Bonanza)
80 no wagering Big Bass Bonanza free spins (on 1st deposit)
100 Bonus up to £100 + 20 Big Bass Bonanza bonus spins

Big Bass Bonanza Expert Review

Theme & Symbols
Bonus Features
Max Win (2,100 x bet)
Sounds & Music
RTP (96.71%)

Slot Details

The Big Bass Bonanza slot has 5 reels, 3 rows and 10 fixed paylines. Winning combinations are simply created when matching symbols appear from left to right, on adjacent reels, beginning from the leftmost reel. With most symbols, you need 3 or more whilst you need 2 or more with the highest value symbol.

Bet levels in Big Bass Bonanza vary widely from 10p to £250 per spin. At newer online casino sites, the max bet may be restricted to £20 or even £10 per spin. Use the plus and/or minus buttons under the reels to change your bet accordingly. Outside the UK, Autoplay is available with up to 1,000 auto spins with loss and win limits. You also will have Quick and Turbo Spin modes for faster action (again, not available in the UK).

The Big Bass Bonanza RTP rate is 96.71%. Much higher than the 96% slots average, Pragmatic Play also offers 95.67% and 94.5% RTP alternative versions. To check which RTP you’re playing with, open the game’s Paytable at your chosen gambling site.

Medium to high volatility, it’s classed as 4/5 on the variance scale. With the hit frequency rate at 13% (a win every 7.69 spins on average), triggering the Free Spins feature will occur every 113 spins on average.

Finally, the Big Bass Bonanza slot can reel in maximum wins of 2,100 times your total bet. The max win probability or odds are 1 in 3,880,481 spins (or 1 in 3.88 million). Winning 1,000 times your total bet or higher will occur every 712,251 spins on average.

Lastly, the Big Bass Splash online slot can reward you with 5,000 times bet max wins. With bigger wins coming in the Free Spins feature, the max win probability is 1 in 3,086,876 spins. Winning 1,000 times your total bet or higher will occur once every 85,761 spins on average too.

Slot Review Game Data
StudioPragmatic Play
Theme Fishing
RTP %96.71% | 95.67% | 94.6%
VolatilityMedium to High
Stake Range10p to £250
Max Win2,100 x Bet
Hit Frequency Rate13% (for 96.71% RTP version)
Bonus Features1
Release Date14th of December 2020
Chris Taylor

Chris Taylor

The king of slots

Chris Taylor is an industry veteran originally from Gibraltar. Having worked in the online gambling industry since 2004, Chris loves slots and has reviewed over 10,000 online slot games. Running a slots-focused website for 13 years, Chris is the go-to guy for everything slots-related. 

👨‍🏫 Specialist Subjects🔬📚

Chris’ online gambling career has spanned more than 2 decades. This includes working for online casino sites, consulting for software/slot providers and running his own slots portal. 

With a passion for slots, Chris reviews games from an honest and blunt point of view to give readers an accurate portrayal of the slots they might play. The slot games are just the start as Chris deep dives into the slot sites to provide factual and insightful information as to where to play the games he so loves. 

Theme, Audio + Symbols

Big Bass Bonanza slot base game screenshot

With a fishing theme, the Big Bass Bonanza slot sees you fish up the biggest wins. Released on the 14th of December 2020, it’s very colourful, pleasant and relaxing visually. Set under the ocean water, the reels appear just below the dark blue water’s surface.

You’ll instantly notice the jolly soundtrack with a ukelele used. On the reels, you’ll come across colourful A, K, Q, J and 10 royals which all offer the same payouts (up to 10 times bet). Then you have money fish symbols in various sizes. Landing 3 or more of any size will award a payout. These are particularly important in the Free Spins feature as you’ll discover below.

Higher-value symbols include tackle boxes, dragonflies, fishing rods and floats. The float symbol pays the most awarding 200 times your total bet for 5 in combination. A screen full of floats will result in a 2,000 times bet payout.

Big Bass Bonanza comes with 2 special symbols. You have the Fisherman Wild which appears on all 5 reels during the free spins and substitutes for all paying symbols. Lastly, there is a Scatter symbol which is key to triggering the free spins. Below, you’ll find a list of all symbol payouts and functions:

  • A/K/Q/J/10: 3, 4 or 5 = 0.5, 2.5 or 10 x bet
  • Money Fish: 3, 4 or 5 = 1, 5 or 20 x bet
  • Tackle Box/Dragonfly: 3, 4 or 5 = 2, 10 or 50 x bet
  • Fishing Rod: 3, 4 or 5 = 3, 15 or 100 x bet
  • Float: 2, 3, 4 or 5 = 0.5, 5, 20 or 200 x bet
  • Fisherman Wild: Appears in free spins + substitutes for paying symbols
  • Scatter: 3+ triggers Free Spins feature

Big Bass Bonanza Mobile

Big Bass Bonanza slot mobile screenshot

Big Bass Bonanza uses HTML5 technology so is available to play on desktop, mobile and tablet devices. It’s compatible with iOS and Android smartphone devices too. The simple 5x3 layout well works on handheld screens.

Bonus Features

The Big Bass Bonanza slot has 2 bonus features with them both coming in the Free Spins feature. Starting with up to 20 free spins, Fisherman Wilds play an important part as they collect Money Fish symbol values and award additional free spins with a multiplier up to 10x. Randomly, Fish Money symbols can appear when 1 Fisherman Wild symbol lands.

Free Spins 

Big Bass Bonanza slot Free Spins feature screenshot

If you land 3 or more Scatters anywhere during a base game spin, you’ll trigger the Free Spins feature. 3, 4 or 5 scatters will result in 10, 15 or 20 free spins respectively.

The most important symbol is the Fisherman Wild who substitutes for all paying symbols when part of a winning combination. You’ll notice that Money Fish symbols contain bet multiplier values. When they land alongside a Fisherman Wild symbol, the values are collected and won. If you had £5, £10 and £20 Money Fish symbols as well as a Fisherman Wild, you’d pocket £35 (£5 + £10 + £20 = £35).

Random Dynamite feature
Randomly, the Dynamite feature is activated when 1 Fisherman Wild and no Fish Money symbols appear during a free spin. Random symbols transform into Money Fish symbols giving you a win.

Multiple Fisherman Wilds on the reels will see the Fish Money values collected by each Fisherman. Importantly, all Fisherman Wilds are collected in a meter above the reels. When you collect 4, you’ll retrigger the feature for additional free spins and an increased multiplier.

Each retrigger sees you awarded 10 more free spins with the multiplier rising to 2x, 3x and finally 10x. With a total of 50 free spins possible, the table below highlights what you’ll get and how to achieve it:

RetriggerFisherman Wilds RequiredExtra Free SpinsFree Spins Multiplier
2nd8 (in total)103x
3rd12 (in total)1010x

Expert Verdict

Big Bass Bonanza slot OLBG rating banner

The Big Bass Bonanza slot was the game that started the Big Bass revolution. Simply designed, the gameplay is rather simple, especially in the base game. Graphically, it’s upbeat, fun and simple to follow.

The focus is entirely on the Free Spins feature where the Fisherman Wild and Fish Money symbols come into their own. If a Fisherman Wild lands alongside Fish Money symbols, the Fish Money symbol values are collected and awarded. The Fisherman Wild is also collected in a meter which will lead to retriggers for every 4 you collect.

This will lead to additional free spins (up to 30) and an increased multiplier of up to 10x. This can lead to 2,100 times bet max wins on each free spin. The 96.71% RTP rate is also high compared to the majority of slot games.

A more modern, fresher theme based on Fishin Frenzy which is fun to play as long as you enter with the knowledge this is a high volatility slot game and losing runs can be quick and lengthy.
Steve Madgwick - Editor-In-Chief -

If you fancy reeling in bigger payouts, Ugliest Catch by Nolimit City comes with 50,000 x bet max wins and a different take on the traditional fishing theme. You also have Razor Returns from Push Gaming which boasts 100,000 x bet max wins and a 96.55% RTP rate.

With Big Bass Bonanza being so enjoyable yet simple, Pragmatic Play has gone on to create a whole Big Bass slot series. There are Megaways versions, higher-paying games with up to 20,000 times bet max wins and ones with Halloween, horse racing and Christmas themes.

Editorial Information

The Big Bass Bonanza slot review was written by Chris Taylor from our OLBG Expert team who who written over 10,000 slot game reviews in an iGaming career spanning over 2 decades. It was then verified/checked by Jenny Mason, our prime Slot reviewer who has 17+ years working in online gambling, top UK brands. 

Jenny Mason

Jenny Mason

Slots content manager

Jenny Mason has more than 17 years of experience in the online gambling industry and has worked for some of the UK’s top betting brands. She started at OLBG in 2014 and her role involves creating great content and looking after the marketing activity. Jenny is knowledgeable in all areas of online sports betting and has an interest in slots and bingo.

👨‍🏫 Specialist Subjects🔬📚

🎰🍒🍀 Jenny has become an expert with online slots completing hundreds of our various new slot reviews and creating and writing some of the slot articles found on site. She has become a firm fan of NoLimitCity and Hacksaw gaming slot in this process and always awaits the new releases with much anticipation


Big Bass Bonanza Slot FAQ's

  • What is the Big Bass Bonanza RTP rate?

    The Big Bass Bonanza RTP rate is 96.71%. A lot higher than the slots average of 96%, Pragmatic Play has also created 95.67% and 94.% RTP versions.

  • What is the max win on Big Bass Bonanza?

    Big Bass Bonanza comes with max wins of 2,100 times your total bet. With the bigger wins coming in the free spins, the max win probability is 1 in 3,880,481 spins.

  • What are the Big Bass Bonanza bet limits?

    You can play the popular Big Bass Bonanza slot from 10p to £250 a spin. The max bet of £250 might be hard to find with some casinos limiting the limit to £20 or even £10 per spin.

  • Is Big Bass Bonanza a good slot?

    Big Bass Bonanza is arguably the most popular fishing slot around. Responsible for starting the Big Bass slot series, it’s used by many casinos in their free spins welcome offers.

  • Is there a Big Bass Bonanza demo?

    The Big Bass Bonanza free play slot can be played for free here at OLBG. You can fish up big wins on laptop, PC, tablet and mobile devices.

  • Where can I play Big Bass Bonanza in the UK?

    The Big Bass Bonanza slot can be played at nearly all UK slot sites and casinos. At the top of our review, check out our range of Big Bass Bonanza free spins offers.

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