


RTP
96.0%
Volatility
High
Max Win
10,000x
4 Fantastic Fish Gigablox is a high-volatility online slot from 4theplayer with an RTP of 96.00% and a maximum win of 10,000x.
Page updated July 2026
This is 4ThePlayer's own build of 4 Fantastic Fish Gigablox, born from a crossover with partner studio Yggdrasil's Gigablox mechanic in much the same way the studio previously paired the format with 90K Yeti. The result keeps most of the original 4 Fantastic Fish's features while bolting on Gigablox's oversized block symbols.
This is one of the brighter entries in an already sun-soaked franchise - thick yellow light beams stretch across choppy seas while a reggae-inflected soundtrack keeps the mood upbeat throughout. The grid itself has grown from the series' usual 6x4 shape into a full 6x6 space to accommodate Gigablox symbols, pushing the ways to win up to 46,656.
Seaweed symbols now dot the reels and, unlike everything else on the board, carry no value and can't form part of any win - they're purely there to occupy space. Gigablox symbols themselves form when adjacent reel positions merge into blocks of 2x2, 3x3, 4x4 or 5x5, and fish symbols land as Gigablox too, breaking down into individual cells for win evaluation purposes.
Card royals 10 through Ace, decorated with little fishing hooks, sit at the bottom of the pay chart, worth 0.4x to 0.8x the stake for six of a kind. Above them, a tackle box, reel, starfish, crab, seagull and fisherman pay 1x to 2.5x for a full six-symbol win. The boat wild substitutes for anything bar the scatter.
The default RTP is 96%, a solid figure, and stakes range from 10p to £/€80 per spin using the plus/minus buttons either side of the spin control. The maths here is rated high volatility, so bigger, less frequent swings should be expected rather than a steady trickle of returns.
Fish for cash prizes, the Gigablox block payouts, and the wider feature set all funnel toward the same 10,000x maximum win, giving multiple routes to the ceiling rather than relying on one specific trigger. The rebuilt 6x6 grid also means Gigablox blocks have considerably more room to form than in a standard 6x4 layout, so the bigger symbol combinations show up more often across a typical session than the raw size of the mechanic might suggest.
As a straight crossover between two established mechanics, 4 Fantastic Fish Gigablox does what it says on the tin - familiar fishing-slot furniture wrapped around a genuinely different grid structure. Fans of the wider franchise looking for something with more ways to win than the standard 4,096 format should find this an easy fit. Try the free demo at johnessyslots before deciding whether the bigger grid earns your real-money stakes.
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4 Fantastic Fish Gigablox has an RTP (return to player) of 96.00%. RTP is the theoretical percentage of total stakes a slot returns to players over a very large number of spins, as published by 4theplayer — individual sessions can land far above or below it.
4 Fantastic Fish Gigablox is rated high volatility. High-volatility slots pay out less often, but wins tend to be bigger when they land — expect longer dry spells and larger swings to your balance.
The advertised maximum win for 4 Fantastic Fish Gigablox is 10,000x. Max wins are extremely rare by design — treat them as a ceiling, not an expectation.
4 Fantastic Fish Gigablox is developed by 4theplayer and was released in Feb 01, 2024.
Verified Data via Johnessy AI