Bob Marlin Goes Deep is a 5-reel Yggdrasil fishing slot with expanding rows, four fish collections, and 16,807 ways unlocked at full size.
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Yggdrasil's Bob Marlin Goes Deep drops you onto a rusty trawler captained by a yellow-overalled fisherman who cranks a winch every time the reels finish spinning. The setting is pure cartoon ocean. Rippling blue water above, jellyfish and kelp drifting below, and a mounted bass marlin trophy sitting proudly above the wooden, rope-wrapped reel frame. Released in July 2025, it runs at 96.80% RTP with low volatility and a 3,905x max win.
The grid starts as a 5×4 with 1,024 ways, and that's where things get interesting. A drill bonus symbol can land on reels 1, 3, and 5 only. Each one drops a fresh row of symbols downward, and three at once trigger the regular free spins round. With every drill, ways multiply: 5 rows give you 3,125 ways, 6 rows push it to 7,776, and a fully expanded 5×7 grid unlocks 16,807 ways to win. Bet range is wide too, $0.10 up to $125 per spin.
Three drills awards 10 free spins on the permanently maxed grid, with no bonus symbols or fish dropping during the round. But the more curious feature is the four-way Collection system. Each fish species (clownfish, anglerfish, and two others) only appears on the bottom three expanded rows during base play. Bag five of any single species and you trigger that fish's own 5-spin Collection bonus, which introduces a Super High symbol paying from just two of a kind. So that's five different free spin modes in total, each tied to a different catch.
Yggdrasil tosses in a session-start head start of 3 out of 5 on the first collection, badged as a New Player Bonus. It's a nice touch, though it does feel like a synthetic carrot to keep you spinning toward that first bonus. The honest gripe? There's no Wild symbol, and a low-volatility 3,905x ceiling means the headline win takes some serious patience to chase. Still, the layered collection mechanic gives the base game more texture than most fishing slots manage, and watching Bob crank his winch on every spin is genuinely charming.
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