Underwater Slots
Every underwater themed slot in the SLOTyi catalogue, ranked by RTP. All 37 games below run free in demo mode — no download, no deposit and no sign-up — so you can compare the maths and the bonus features before you pick one.
37 slots — click any title for the full review and free demo.
Razor Shark
Push Gaming
RTP 96.7% · High
Razor Returns
Push Gaming
RTP 96.7% · High
Atlantis Crush
Relax Gaming
RTP 96.6% · High
Shark Hunter
Atomic Slot Lab
RTP 96.55% · High
Waves of Poseidon
Pragmatic Play
RTP 96.55% · High
Mermaid’s Treasure Trove
Pragmatic Play
RTP 96.54% · High
Big Bass Splash 1000
Pragmatic Play
RTP 96.52% · High
Big Bass Trophy Fishing
Pragmatic Play
RTP 96.5% · High
Kraken's Hunger
BGaming
RTP 96.5% · High
Release the Kraken 2
Pragmatic Play
RTP 96.5% · High
Muddy Waters
Peter & Sons
RTP 96.49% · High
Wild Wild Pearls
Pragmatic Play
RTP 96.46% · High
Mermaid’s Pearl
Novomatic
RTP 96.45% · Medium
Mystic Ocean
NetEnt
RTP 96.45% · High
Release the Kraken Megaways
Pragmatic Play
RTP 96.4% · Medium-High
Savage Shark
Leander Games
RTP 96.4% · High
Goldfish Gambit
WMS Gaming
RTP 96.4% · High
Razor Nudge
Push Gaming
RTP 96.39% · Low
Marlin Masters Atlantis
Hacksaw Gaming
RTP 96.34% · Medium
Octo Attack
Hacksaw Gaming
RTP 96.27% · Medium
Squid From The Deep
BF Games
RTP 96.23% · High
Dorks of the Deep
Hacksaw Gaming
RTP 96.2% · Medium
Jawsome Pirates
iSoftBet
RTP 96.18% · Medium
Atlantis 10K Ways
ReelPlay
RTP 96.16% · Medium-High
Treasure Tumble
Relax Gaming
RTP 96.1% · High
Atlantis Megaways
ReelPlay
RTP 96.09% · Medium
Fishy Business
TrueLab Games
RTP 96.06% · Medium
Neptune’s Fortune Megaways
iSoftBet
RTP 96.03% · Medium
Mystic Dolphin Charge Up
ReelPlay
RTP 96.02% · High
PIRANHA BITE CLUB
EXCO Game Studio
RTP 96.0% · Medium-High
Fishtastic
Red Tiger Gaming
RTP 96.0% · Medium
Tropical Treasure
SimplePlay
RTP 95.87% · Medium-High
Turtle Paradise
Red Tiger Gaming
RTP 95.68% · Medium
Ocean's Treasures
Zillion Games
RTP 94.86% · Medium
Shark's Bay
Zillion Games
RTP 94.31% · Medium
Coral Queen Oranje Jackpot
Pragmatic Play
RTP 94.05% · Medium
Golden Fish Tank Party
Yggdrasil Gaming
RTP 90.5% · High
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