Big Bass Bonanza slot review

Pragmatic Play's fishing slot is the game UK casinos reach for when they hand out welcome spins. Underneath the cartoon tackle box is a simple, patient, high volatility slot.

  • Default RTP96.71%
  • VolatilityHigh
  • Max win2,100x
  • DeveloperPragmatic Play

Key takeaways

  • 96.71% default RTP, the highest in our library.
  • High volatility: the feature carries the game.
  • 2,100x maximum win.
  • Used for PlayOJO's 80 welcome spins.

Big Bass Bonanza at a glance

Original artwork for our Big Bass Bonanza review
DetailBig Bass Bonanza
DeveloperPragmatic Play
Default RTP96.71%
VolatilityHigh
Reels and rows5 reels, 3 rows
Ways to win10 paylines
Maximum win2,100x stake
Released2020
UK maximum stake£5 (£2 for ages 18 to 24)

Developer's published defaults, confirmed against two or more independent sources on 5 October 2026. Your casino may run a lower RTP setting.

Default RTP 96.71%

Scale 90% to 100%. Marker shows the 96% benchmark.

Volatility High

Low, medium or high, as rated by the developer or sources.

Maximum win 2,100x

Steps at 500x, 2,000x, 5,000x and 20,000x.

How it plays

Five reels, three rows and ten fixed paylines paying left to right. Card ranks make up the low symbols; floats, rods and tackle boxes pay more. Fish symbols each show a cash value, but in the base game they only pay as ordinary line wins. You are waiting for three scatters.

The features

Free spins

Three, four or five scatters start 10, 15 or 20 free spins. Now the fisherman wild matters: each one that lands collects the cash value on every fish in view.

Retriggers and multipliers

Fishermen are counted. Every fourth one adds 10 more spins and raises the multiplier on fish values, climbing to 10x on the final stage.

The numbers

A default return of 96.71% sits above the 96% benchmark, though a 95.67% setting is also reported at some casinos. Volatility is high. The base game hands back relatively little, and the feature can be hundreds of spins apart. The 2,100x ceiling is modest by modern standards; the sequels push it higher.

Playing it in Britain

Nothing about this slot relies on a feature buy, so the British version is the full game. The usual rules apply: £5 maximum stake, 2.5 seconds a spin, no autoplay.

Good and bad

Good

  • Above-average default return.
  • One feature, easy to follow.
  • Found at most UK slot sites.

Not so good

  • Slow base game.
  • Low maximum for a high volatility slot.
  • Lower RTP settings in circulation.

Who it suits

Players who enjoy building towards a bonus round and can sit through the wait. If you want something to happen every few spins, look at Starburst instead.

How it compares

It is one of three Pragmatic Play slots in our library.

SlotDeveloperDefault RTPVolatilityLayoutWays to winMax win
Big Bass BonanzaPragmatic Play96.71%High5 reels, 3 rows10 paylines2,100x
StarburstNetEnt96.09%Low5 reels, 3 rows10 paylines, paying both ways500x
Sweet BonanzaPragmatic PlayVaries by version (96.48% to 96.51% quoted)High6 reels, 5 rowsPays anywhere (8 or more matching symbols)21,100x
Gates of OlympusPragmatic Play96.50%High6 reels, 5 rowsPays anywhere (8 or more matching symbols)5,000x
Book of DeadPlay'n GO96.21%High5 reels, 3 rows10 paylines5,000x
Fishin' FrenzyBlueprint Gaming (Reel Time Gaming)96.12%Medium to high5 reels, 3 rows10 paylines5,000x
Fluffy FavouritesEyecon95.39%High5 reels, 3 rows25 paylines5,000x

See them ranked on the high RTP slots page, or read volatility explained to understand the biggest difference between them.

Want to see it against one other game? Use the slot comparison tool. You can also try it in free demo mode first.

Where to play Big Bass Bonanza

Pragmatic Play games are reported in the lobby at PlayOJO, Coral, Ladbrokes, Casumo and 10bet. Lobbies change, so search for the title once you are logged in. Demo play is available at most sites after age verification.

Ad 18+ only. We may earn commission from these links. Advertiser disclosure

PlayOJO logo

PlayOJO 4.2 out of 5

80 free spins, no wagering

No wageringFree spins

Claim at PlayOJO (advert, opens in a new tab)18+. New customers. T&Cs apply.
Wagering
None
Minimum
£10
Time limit
See offer terms
Worked value
80 spins at £0.10 (£8 in spins)

Significant terms: 18+. First deposit only. Minimum deposit £10. 80 free spins on Big Bass Bonanza, £0.10 each. No wagering requirements; winnings paid in cash. Cannot be used with any other offer. Only available to players who arrive through the designated offer link. Full T&Cs apply. BeGambleAware.org

Read the PlayOJO review Licence: Skill On Net Limited, UKGC account 39326. Offer checked 5 October 2026.

Coral Casino logo

Coral Casino 4.3 out of 5

Bet £10 on slots, get 100 free spins

No wageringFree spins

Claim at Coral (advert, opens in a new tab)18+. New customers. T&Cs apply.
Wagering
None
Minimum
£10
Time limit
48 hours to accept, then 7 days
Worked value
100 spins at £0.10 (£10 in spins)

Significant terms: 18+. New players only. Offer runs 01/10/2026 to 01/02/2027. Deposit (certain types excluded) and bet £10+ on slot games to get 100 free spins (selected games, £0.10 each, 48 hrs to accept, valid 7 days). No wagering on free spin winnings. Deposits by Neteller, PayPal, Paysafe, Skrill, prepaid cards and certain debit cards do not qualify. Restrictions and T&Cs apply. BeGambleAware.org

Read the Coral review Licence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.

Ladbrokes Casino logo

Ladbrokes Casino 4.2 out of 5

Play £10 on slots, get up to 500 free spins

No wageringFree spins

Wagering
None
Minimum
£10
Time limit
Claim daily for 10 days; each batch valid 7 days
Worked value
Up to 500 spins at £0.10 (up to £50 in spins)

Significant terms: 18+. New customers only, from 14/11/25 until further notice. Certain deposit methods excluded. Deposit and spend £10+ on slots for 50 free spins a day during the first 10 days after first deposit and registration (max 500, £0.10 each, selected games, claim before 23:59 each day, valid 7 days). No wagering. Prepaid cards, PayPal, Paysafe, Neteller, Skrill and Moneybookers deposits do not qualify. Restrictions and T&Cs apply. BeGambleAware.org

Read the Ladbrokes review Licence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.

Casumo logo

Casumo 4.2 out of 5

50% bonus up to £100

10x wageringMatched deposit

Claim at Casumo (advert, opens in a new tab)18+. New customers. T&Cs apply.
Wagering
10x bonus
Minimum
£20
Time limit
7 days to complete wagering
Worked value
Deposit £200, get £100 bonus

Significant terms: 18+. New customers only. Opt-in required. 50% deposit bonus up to £100 on first deposit. Minimum deposit £20. 10x wagering on the bonus amount. Maximum bet or spin £5. Bonus valid for 7 days. Game, play and payment method restrictions apply. Full T&Cs apply. BeGambleAware.org

Read the Casumo review Licence: Recro Limited, UKGC account 61549. Offer checked 5 October 2026.

10bet Casino logo

10bet Casino 3.8 out of 5

100% bonus up to £25

10x wageringMatched deposit

Claim at 10bet (advert, opens in a new tab)18+. New customers. T&Cs apply.
Wagering
10x bonus
Minimum
£10 (check at sign-up)
Time limit
3 days to complete wagering
Worked value
Deposit £25, play with £50

Significant terms: 18+. New UK customers only. Select the casino welcome bonus at sign-up and make your first deposit within 7 days. 100% bonus up to £25. Wager the bonus 10x on slots within 3 days. Maximum bonus winnings £1,000. Bonus is not redeemable. Full T&Cs apply. BeGambleAware.org

Read the 10bet review Licence: Blue Star Planet Limited, UKGC account 43173. Offer checked 5 October 2026.

Big Bass Bonanza is a game of chance with a house edge. Set a limit before you play; help is on our safer gambling page and on 0808 8020 133.

Frequently asked questions

What is Big Bass Bonanza's RTP?

96.71% by default; some casinos run a lower setting.

How do the free spins trigger?

Three or more scatters award 10, 15 or 20 spins.

What is the maximum win?

2,100 times your stake.

Who makes it?

Pragmatic Play, released in 2020.

18+ only. Please gamble responsibly.

Gambling can be addictive. Free, confidential help is available 24 hours a day from the National Gambling Helpline on 0808 8020 133. Visit BeGambleAware.org and GamCare, or block yourself from all UK-licensed gambling sites with GAMSTOP.

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