Big Fin Bay

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Rules and Gameplay

Dive into the engaging world of Big Fin Bay, a fishing-themed slot masterpiece by Thunderkick that breaks away from the conventional slot format. This game is ingeniously set across 6 reels, featuring a dynamic symbol arrangement ranging from 2 to 7 icons per reel. Unlike traditional Megaways games, Big Fin Bay introduces a stable 5,040 ways to win during the base game, promising a thrilling adventure with each spin. Players are tasked with aligning symbols from left to right, amidst expanding wilds and an exciting free spins bonus, enriching the gameplay with depth and excitement.

Bonus Features

Big Fin Bay’s treasure trove of bonus features significantly elevates the gaming experience:

  • Expanding Wilds: The Marlin Wild symbol is a game-changer, capable of landing on all reels. It substitutes for regular pay symbols, potentially covering the entire reel to aid in winning combinations.
  • Mystery Wild Feature: Activated randomly within the base game, this feature can transform up to 3 reels into wilds, dramatically increasing the odds of a significant win.
  • Free Spins Bonus Round: Triggered by landing three or more scatter symbols, players can be awarded up to 36 free spins. During these rounds, wilds not only expand but also grant respins, with the potential to further expand reels and pay ways.
  • Reel Expansion: Unique to the free spins rounds, reels can grow up to 7 symbols tall, unlocking up to 117,649 ways to win. Fully expanded reels further reward players with additional free spins, amplifying the excitement and win potential.


Big Fin Bay’s symbol collection is a vibrant homage to the nautical theme:

  • High-Paying Symbols: Adorned with premium fish symbols and the esteemed fisherman, these icons offer rewards from 2 to 7 times the stake for six of a kind.
  • Low-Paying Symbols: The card symbols (10, J, Q, K, A) act as the game’s lower-value symbols, crafted to blend seamlessly with the aquatic theme.
  • Wild Symbol: The golden marlin stands as the wild, replacing other symbols to form wins and expanding across reels to enhance winning possibilities.
  • Scatter Symbol: Scatters are your key to unlocking the free spins bonus round, offering a dive into richer gameplay.


With its high volatility and an RTP of 96.14%, Big Fin Bay promises substantial rewards, boasting a maximum payout of up to 15,040 times the stake. This slot game offers a blend of excitement and opportunity for significant wins, especially through its bonus features and expanding reels.

Symbol 3 of a Kind 4 of a Kind 5 of a Kind 6 of a Kind
Fisherman 1.0x 2.0x 3.0x 7.0x
Red Fish 1.0x 1.5x 2.2x 3.2x
Purple Fish 1.0x 1.4x 2.0x 3.0x


Big Fin Bay stands out with its unique pay ways system, offering a solid foundation of 5,040 ways to win in the base game, which can escalate up to 117,649 ways during the free spins rounds. This innovative approach provides a refreshing departure from traditional paylines, ensuring every spin can bring unexpected excitement and wins.

Pros & Cons

Pros Cons
Innovative fixed pay ways in base game, expanding in bonus rounds. High volatility may deter players preferring frequent wins.
Expanding wilds and free spins for dynamic gameplay. Mystery Wild feature’s randomness may not appeal to strategy-focused players.
Engaging theme with high-quality visuals and sound design. Potential win max of 15,040x stake may not satisfy jackpot hunters.

Minimum and Maximum Bet

The Big Fin Bay slot allows for a minimum bet of $0.10, making it accessible for casual gamers and those on a budget. On the higher end, it accommodates bets up to $100 per spin, appealing to high rollers and those looking for bigger wins.

Game Jackpot, RTP & Variance

The game boasts a jackpot of up to 15,040 times the stake, coupled with an RTP (Return to Player) of 96.14%. Its high variance indicates that while wins may be less frequent, they have the potential to be significantly larger when they occur, catering to players who enjoy the thrill of chasing big wins.

About Provider

Thunderkick is the innovative game provider behind Big Fin Bay, known for its creative and visually appealing slot games. With a focus on quality and player engagement, Thunderkick has established itself as a reputable developer in the online gaming industry, consistently delivering games that push the boundaries of traditional slot mechanics.

How To Play

  1. Adjust your bet size using the game’s controls to set a wager between $0.10 and $100.
  2. Press the spin button to start the game and watch the reels turn.
  3. Win by matching symbols on adjacent reels, starting from the leftmost reel.
  4. Trigger the free spins round by landing three or more scatter symbols anywhere on the reels.
  5. Watch for the Marlin Wild symbol, which can expand to cover entire reels and substitute for other symbols to create wins.
  6. Take advantage of the Mystery Wild feature and the potential for expanded reels during the free spins for increased win ways.


Big Fin Bay offers a refreshing and dynamic gaming experience with its unique combination of fixed and expanding pay ways, engaging theme, and the potential for significant wins. Despite its high volatility, the game’s innovative features, such as expanding wilds and free spins, make it a compelling choice for players seeking excitement and the chance for big payouts. Thunderkick’s commitment to quality and innovation is evident in Big Fin Bay, making it a standout title in their portfolio and a must-play for slot enthusiasts.