Big Fin Bay Demo Slot by Thunderkick Free Play

Big Fin Bay is an online Slot from Thunderkick.

Quick Facts

- Layout: 6 reels x 2-7 rows

- Paylines: 5,040 fixed (up to 117,649 in bonus)

- Key mechanics: Expanding Wilds, Mystery Wilds, Free Spins with reel expansion

- Special symbols: Marlin Wild, Anchor Scatter, Captain Fisherman

How the Game Plays

Big Fin Bay invites you to a picturesque coastal harbor where a seasoned captain searches for the legendary golden marlin. Thunderkick utilizes a unique "Pay Ways" engine on a six-reel grid that visually resembles Megaways but operates with its own distinct logic. In the base game, the number of symbols on each reel shifts between 2 and 7 on every spin, yet the engine maintains a fixed 5,040 ways to win. Winning combinations are formed by landing matching symbols on three or more adjacent reels, starting from the far left. The captain acts as the highest-paying symbol, accompanied by four different fish and standard royal icons.

Free Spins Explained

Landing three or more anchor scatters triggers the bonus round. Each reel containing a scatter awards a random number of free spins (up to 6), meaning you can start with a maximum of 36. This feature is where the engine's full potential is unlocked; whenever a Marlin Wild lands, it expands to cover the entire reel and triggers a respin. Crucially, these wilds cause the reels to expand permanently for the rest of the bonus. If a reel reaches its maximum height of 7 symbols, you receive 3 additional free spins. Expanding all six reels to their full height activates the maximum 117,649 ways to win.

Expanding & Mystery Wilds Explained

The marlin wild is central to the gameplay, appearing on all reels to substitute for standard pay symbols. In the base game, any wild that contributes to a win will automatically expand to fill its entire reel. Furthermore, the Mystery Wild feature can activate randomly during any base game spin, turning up to three reels completely wild to help reel in significant wins.

Click the Play for Free button to load the Big Fin Bay demo, test its features and payouts and decide if it is a game you enjoy.