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BETFRED CASINO

200 Free Spins on selected games (10 days, 20/day)

£10 min deposit

Casino Terms - New customers only. Opt In required. £/€10 min stake on Casino slots within 30 days of registration. Max bonus 200 Free Spins on selected games credited within 48 hours. Free Spins expire after 7 days. iOS app restrictions may apply. Email/SMS validation may apply. Not available in NI. Full T&Cs apply.Terms & Conditions Apply T&C's Apply

PLAYZEE

100% up to £25

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£20 min deposit · 10x wagering

18+. New players only. Min deposit £20. Welcome offer is 100% bonus match up to £25. Bonus funds are separate to cash funds and subject to 10x wagering requirement (bonus amount). Only bonus funds count towards wagering contribution. £5 max bonus bet. Bonus funds must be used within 7 days. Affordability checks apply. Terms Apply. BeGambleAware.org T&C's Apply

CASIKU CASINO

Deposit £50 Get 50 Wager-Free Spins On The Big Bass Splash Slot

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£50 min deposit

18+. New players only. Opt-in required. Min. deposit £20. Welcome Offer is 50 wager free spins on Big Bass Splash when wagering min. £50 on slots by 23:59 GMT on day of first deposit. Free spins must be used within 72hrs. Winnings from free spins credited as cash funds and capped at £50. Cash funds are immediately withdrawable. Affordability checks apply. Terms apply. BeGambleAware.org T&C's Apply

DREAM VEGAS

Deposit £20 Get 50 Spins On The Big Bass Splash Slot

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£20 min deposit · 10x wagering

18+. New players only. Min. deposit £20. Max. bonus bet is £5. Welcome Offer is 50 free spins on Big Bass Splash on your first deposit and 50% match up to £50 on your 2nd deposit. To claim the free spins you also need to wager a minimum of £10 of your first deposit on slots. Free spins must be used within 72 hours. Winnings from free spins credited as cash funds and capped at £100. Bonus funds expire in 30 days, subject to 10x wagering. Affordability checks apply. Terms apply. BeGambleAware.org. T&C's Apply

UNIBET

Deposit £30 Get 300 Spins On The Big Bass Splash Slot

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£30 min deposit · 10x wagering

18+ | GambleAware.org. New GB customers only. Opt in, Deposit & Stake £30 on Slots to get 300 x £0.10 Free Spins on Big Bass Splash,10x wagering. Debit card or instant bank transfer only. Claim within 7 days. Spins expire within 48 hours. Game contributions vary, max stake applies. Geographical restrictions and T&Cs apply. T&C's Apply

SLOTNITE

Deposit £20 Get 500 Wager-Free Spins

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£20 min deposit

18+. New players only. Min dep £20. Welcome Offer valid for 14 days from registration: earn 2 points per £10 wagered on Slots (1 point per £10 on Video Poker and qualifying Side Bets; 0.25 per £10 on Roulette) to unlock wager-free spins on selected games - up to 500+ spins over the 14-day window. Max accumulation 2000 points. Spin winnings credited as cash funds, capped at £100 per batch of spins. Terms apply. BeGambleAware. T&C's Apply

Sirens Kingdom

Play at SpinYoo Casino

RTP 96.18%

Volatility Medium-High

Provider Iron Dog Studio

Reels 5

Paylines 30

Play Sirens Kingdom at SpinYoo Casino Play Now View All Sites

Sirens Kingdom Specifications

Software	Iron Dog Studio
Game type	Video slot
Theme	Fantasy , Underwater & Ocean
RTP	96.18%
Volatility	Medium-High
Reels	5
Paylines	30
Max Wager (per line)	5
Max Jackpot	400
Bet range	0.01 – 5.00
Paylines type	Fixed
Symbols	Wild Symbol, Scatter Symbol
Bonus features	Free Spins
Progressive Jackpot	No
Practice Play	Yes
Autoplay	Yes

By Becky M. | Updated 13 November 2024

Dive deep into the ocean and join the mermaid in an underwater adventure. Siren’s Kingdom is a 5 reel, 30 payline slot from Iron Dog Studios and is playable on all devices.

Becky M.

Founder & Editor-in-Chief at Slotfruit

Rebecca (Becky) Mosley has been at the heart of the UK online gambling industry since 2008 – making her one of the most experienced voices in the space. She founded Take Marketing Limited and built SlotFruit.co.uk into one of the longest-running independent casino comparison sites in the country.

As editor-in-chief, Becky brings a genuine player-first perspective to everything on the site. She personally oversees every casino review and slot guide, making sure readers get straight-talking, honest information rather than marketing fluff. Her approach has always been the same: transparency, fair bonus terms, and responsible gambling above all else.

Over 17 years in the industry, Becky has built deep expertise across UK Gambling Commission licensing, slot game mechanics, bonus structures, and the constantly evolving regulatory landscape. She works directly with operators and software providers to keep every listing accurate and up to date.

Becky is a Companies House registered director (Take Marketing Limited, company no. 07619813) and is based in Lincolnshire, England.

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