The fishing slot is one of the most reliably popular sub-genres in the UK market. It maps onto a domestic leisure activity with broad cultural resonance, the imagery is bright and unthreatening, and the collect-mechanic that defines the category produces bonus rounds with clear, easy-to-follow win moments. Big Bass Bonanza and Fishin' Frenzy are the two titles that dominate this segment, and despite coming from different providers with different commercial cultures, they have converged on remarkably similar core gameplay.
The shared mechanic is the fisherman wild. In both titles, the base game plays as a fairly conventional payline slot — Big Bass on 10 paylines across a 5x3 grid, Fishin' Frenzy on 10 paylines across the same grid shape. Three or more scatter symbols trigger a free spins round, and inside that round the fisherman symbol becomes a wild that also collects the monetary value of any fish symbols visible on the reels at the moment it lands. Catch a fisherman with several high-value fish on screen and the collect can be substantial. The mechanic is simple to understand, visually satisfying, and lends itself to streaming and social-share content in ways that more abstract bonus rounds do not.
RTP comparison
Big Bass Bonanza publishes at 96.45% theoretical RTP. Fishin' Frenzy publishes at 96.12%. The headline gap is 0.33 percentage points, which over £10,000 of staked play translates to about £33 in expected return. Real but modest. The more important consideration is what happens at deployment. Pragmatic Play uses a standardised three-tier system across most of its catalogue: roughly 96.45%, 95.45%, and 94.45% on Big Bass specifically. Blueprint Gaming takes a more title-by-title approach, with Fishin' Frenzy historically offered in a wider range of configurations including a 95.07% middle option and a 94.00% lower tier at some operators.
This means the deployed gap between the two titles can either widen or narrow significantly depending on the operator's choices. At a top-tier UK casino running both at their published maximums, Big Bass holds a 0.33pp advantage. At an operator that has stepped Big Bass down to 95.45% but kept Fishin' Frenzy at 96.12%, the gap reverses. At an operator that has stepped both down aggressively, both titles become problematic. The point is not to memorise specific deployments but to verify the in-game RTP figure on whichever title you intend to play before extended sessions.
Volatility and bonus structure
Both titles sit in the medium-high volatility band, but the distribution of payouts differs. Big Bass concentrates more of its expected return in the free spins round, where collected fish values can stack up significantly if multiple fishermen land on the same screen. The base game pays modestly and the bonus is the engine of meaningful wins. Fishin' Frenzy has a slightly flatter distribution — the base game pays a touch more frequently, and the bonus is correspondingly less weighted in the overall RTP calculation. Players who want a more explosive bonus-or-bust experience will lean toward Big Bass; players who want a more session-friendly base game will prefer Fishin' Frenzy.
Franchise depth
Both titles have spawned extensive sequel families, and this matters for selection. Big Bass has the broader sequel catalogue, with Big Bass Splash, Big Bass Halloween, Big Bass Christmas Bash, and dozens more variants — most retaining the core mechanic with theme variations and occasional bonus structure changes. The Megaways adaptation extends the engine further. Fishin' Frenzy has a tighter sequel family but includes the genuinely distinctive Fishin' Frenzy Megaways, which applies the Megaways variable-reel framework to the collect mechanic and produces dramatically higher max-win potential. If you have enjoyed either base title, exploring the sequel families is often more rewarding than switching to the rival franchise.
UK deployment patterns
Big Bass distribution in the UK is broad — virtually every UKGC-licensed operator carries the title, and tier deployment varies by commercial relationship. Fishin' Frenzy distribution is similarly broad but with a stronger presence at operators with historical Blueprint relationships, particularly those owned by Entain and Flutter. Top-tier operators tend to deploy both at or near their published maximums; mid-market operators frequently step both down, sometimes by similar amounts and sometimes asymmetrically. The verification habit applies to both.
Verdict
At the published maximum on both, Big Bass Bonanza holds a small mathematical edge that is generally outweighed by player preference for either bonus structure. At deployed configurations, the comparison becomes operator-specific and requires checking both in-game information panels before committing. Players who genuinely cannot choose between them should default to the higher-deployed title at their specific casino. For the underlying logic on RTP variability, see our what is RTP primer.