4 Fantastic Fish GigaBlox

Gigablox Joins the Fish Tank

4 Fantastic Fish Gigablox takes the established fishing formula and merges it with the Gigablox mechanic, stretching the grid out to a 6x6 layout capable of throwing up to 46,656 ways to win - a considerable jump from the standard 4,096 seen elsewhere in the range.

What Gigablox Changes

Alongside regular symbols and cash-value fish, oversized Gigablox blocks can form anywhere on the grid, ranging from 2x2 up to a full 5x5 in size. These aren't just visual flourishes - Big Fish blocks pay 25x per cell for a maximum of 100x, Super Fish (3x3) pay 50x per cell up to 450x, Mega Fish (4x4) pay 125x per cell up to 2,000x, and the rare Ultra Fish (5x5) pay 400x per cell for a maximum of 10,000x on their own, which also happens to be the game's overall win cap.

Setting the Scene

It's the same bright underwater world the series is known for - light-dappled coral reefs, cheerful marine life, and a soundtrack that keeps things relaxed rather than tense. The visual highlight is watching those giant Gigablox symbols crash onto the grid, with the Giant Squid making surprise appearances to shuffle the reels and a hungry Shark lurking for high-value moments in the bonus game. Fish symbols also land as Gigablox blocks, breaking down into individual cells once it's time to evaluate the win.

Reading the Return

RTP sits at 96%, a strong figure for a Gigablox title, and volatility is pitched as medium - lower than several of its 4 Fantastic Fish siblings, which suits the more incremental, block-by-block way wins build here compared to a single explosive bonus round. That medium rating should translate into a steadier rhythm across a session than the high-volatility entries elsewhere in the range.

Stakes and Payout Ceiling

Betting runs from 10p to £/€80 per spin. The 10,000x maximum win, while matching several other entries in the range, feels more attainable here given the multiple paths to it - regular ways wins, fish cash prizes, and the tiered Gigablox block payouts all contributing separately rather than being locked behind one specific bonus trigger.

Verdict

Where some fishing slots rely purely on a big bonus round for their appeal, this Yggdrasil-developed Gigablox spin-off spreads the excitement across the base game as well, thanks to those escalating fish blocks. It's a worthwhile pick for players who prefer to see progress build gradually across a session rather than banking everything on a single free spins trigger. The free demo at johnessyslots is the easiest way to watch the 5x5 Ultra Fish blocks in motion before playing for real stakes.