Bob Marlin Goes Deep from Yaggdrasil Gaming

RTP: 96.8%

Bob Marlin Goes Deep

Cast your line for a different kind of catch in Bob Marlin Goes Deep, an innovative casino game from Yggdrasil Gaming. This title puts you on the open water with an experienced fisherman and his unique rig. Its main attraction is an inventive Expanding Reels feature and a special Collection Free Spins round where you gather fish to unlock powerful Super High-Paying symbols. Dive deep, reel in the big ones, and discover a new way to fish for treasure in this high RTP slot!

Provider: Yggdrasil Gaming
Release Date: 2025
RTP: 96.8%
Volatility: Low-Medium
Max Win: 3,905x
Theme: Fishing / Ocean / Nature
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Feature Value
Reels 5
Rows 4 (expands to 7)
Paylines 1,024 (up to 16,807 ways to win)
Min Bet €0.10
Max Bet €125
Max Win 3,905x
Jackpot No
RTP 96.8%
Volatility Low-Medium
Hit Frequency 20.67%

Thematics and Design: The game is set on a calm, open sea, with the fishing action taking place on a mechanical net rig. The design is clean and simple, with a focus on the unique mechanics of the game rather than a complex theme.

Graphics and animations: The graphics have a clear and polished style. The main animations involve the mechanical net expanding and the fish symbols being collected, which is a smooth and satisfying visual process.

Sound Accompaniment: A calm and gentle soundtrack plays, accompanied by the sounds of the sea and the fishing equipment. The audio creates a relaxing and peaceful atmosphere, perfect for a long fishing session on this unique mobile slot.

Regular Symbols: The symbols are a mix of low, high, and super high-paying symbols. The top symbols are four different types of fish, which are also used for the collection feature.

Special Symbols:

  • Scatter Symbol: A special Scatter symbol can land on reels 1, 3, and 5. Landing one expands the reels, while landing three triggers the Free Spins.
  • Collectible Fish: The four high-paying fish symbols can be collected from the expanded rows to trigger the Collection Free Spins.

Casting your net is a unique experience. Set your bet, then press ‘Spin’. Landing a Scatter will expand the reels for that spin. The goal is to collect 5 of the same fish type from the expanded rows to trigger the main bonus. To understand this unique trigger, we recommend trying the free slot machine demo on our site. The game is fully optimized for a deep-sea adventure on all devices.

Expanding Reels

The base game starts on a 5×4 grid. Landing a Scatter on reels 1, 3, or 5 will expand the reels downwards by one row for that spin. It’s possible to expand the grid up to 5×7 with 16,807 ways to win.

Collection Free Spins

This is the main feature. The four high-paying fish symbols can appear on the expanded rows. Any that land are added to their respective collection meters. When you collect 5 fish of the same type, you trigger the Free Spins round. In this mode, the grid is fully expanded, and the collected fish type becomes a “Super High-Paying” symbol, which only requires a 2-of-a-kind match to win.


RTP: This is a very high RTP slot, featuring an excellent Return to Player of 96.8%. This offers players outstanding theoretical value for their money.

Volatility: This classic slot has low-medium volatility. This makes for a very relaxing and consistent casino game experience. The expanding reels feature provides frequent action, and the collection mechanic gives a constant sense of progression. It’s perfect for players who prefer steady gameplay over high risk.


Bob Marlin Goes Deep is an interesting and innovative take on the fishing genre. It forgoes the popular “collect” bonus for a unique expanding reel and symbol collection trigger. While the features might feel less explosive than other fishing games, its very high RTP and low volatility make it a fantastic choice for players looking for a long, relaxing, and statistically rewarding session. It’s a different kind of fishing trip, but one that can be very worthwhile.

Pros Cons
✅ Very high RTP of 96.8% ❌ Max win is quite low
✅ Innovative expanding reels and collection feature ❌ Lacks the popular “cash collect” feature of other fishing games
✅ Low-Medium volatility is great for long sessions ❌ Free spins feature is very simple
✅ A unique twist on the fishing theme

Suitable for: Casual players, fans of high RTP slots, and those looking for a different, more relaxed style of fishing game.


What is the RTP of Bob Marlin Goes Deep?

The RTP of this slot is a very high 96.8%.

Can I play Bob Marlin Goes Deep for free?

Yes, a demo of this free slot machine is available on our site for you to go deep-sea fishing without any risk.

Does it have a free spins feature?

Yes, it has a Collection Free Spins feature that is triggered by collecting 5 of the same fish type from the expanding reels. This bonus is played on a fully expanded grid with a special Super High-Paying symbol.

What is the maximum win in Bob Marlin Goes Deep?

The maximum potential win is 3,905 times your total bet.

Is Bob Marlin Goes Deep mobile-friendly?

Yes, the game is perfectly optimized with HTML5 to work on all modern mobile phones and tablets.


  • Bob Marlin Goes Splashing (Yggdrasil): The sequel that combines the Bob Marlin character with the powerful Gigablox mechanic.
  • Big Bass Bonanza (Pragmatic Play): The legendary fishing-themed slot that popularized the “cash collect” and progressive trail feature.
  • Dwarf Mine (Yggdrasil): For players who enjoy the expanding reel mechanic, but with a different theme.
  • Valley of the Gods (Yggdrasil): Another innovative Yggdrasil slot with a different set of engaging respin and collection mechanics.
  • Fishin’ Frenzy (Blueprint Gaming): The original classic slot that started the entire fishing game trend.