Our pick of the very best underwater themed online slots

  • Take the plunge and spin your way to some hefty underwater treasures
  • From Mermaids and submarines to fishing for prizes, here are the best slots from the deep

With ocean covering 71% Earth’s surface, who knows what mysteries and treasures lie in the deep, dark depths. But, it’s treasures of the jackpot kind that we’re interested in, even if it means you have to have a few spins to find them. Forget deep sea exploration, for us it’s all about slots.

Fortunately, there are plenty of underwater-themed online slots out there to delve into. But, in the spirit of finding that treasure we’ve decided to take a look at five of the very best to get you started. There’s fish, there’s ships, there’s mermaids and there’s most certainly plenty of prizes!

Marvellous Marlins

Marvellous Marlins
Possibly a controversial one for the first pick. Why? Because, remarkably, Marvellous Marlins features just the one payline. Yep you heard us right, all that action that takes place in Marvellous Marlins happens on just one payline. So, why on earth is in in our list?

To start with, it is graphically stunning with its rich blues and cartoon style symbols, including a purple octopus. Secondly, there’s nothing complicated about it – there are no wilds, no scatters and no bonuses – all you need to do is catch marlins to win.

The game is different and, because of its simplicity, it’s a refreshing change from other slots. In fact, it’s so entertaining that you don’t even notice the lack of bells and whistles, just the beautiful back drop as you find yourself engrossed in catching those marlins.

WHERE TO PLAY: Try it now at Videoslots Casino.

Wild Seas

Wild Seas Slot

Technically not underwater, but you’ll forgive us when you discover that this new slot game by Elk Studios is a real cracker that’s worth checking out for a trip on the high seas.

Featuring five reels and 178 ways to win, Wild Seas looks down on a landscape with a skull island to the left and the tip of land on the right boasting a lighthouse.

The main feature is the Sailing Wild symbol, which lets you get your hands on some free spins. The addition of Pirate ships appearing on reel five and firing at sailing ships as they escape across the reels is a cool touch that adds to the overall gameplay factor, too. It’s new and its great fun, which is why we recommend giving Wild Seas a go

WHERE TO PLAY: Try it now at Casumo Casino.

Mermaids Millions

mermaids millions slot
Sometimes the oldies are the best, and Microgaming’s Mermaid Millions certainly falls into that category. The graphics may be simple, but the bold underwater themed blue grabs the attention, as do the bright symbols including seahorses, pots full of gems and the lovely mermaid scatter symbol.

There is a decent free spin feature included too, as well as a treasure feature – both of which are nice additions, especially as in free spins you can earn multipliers and almost constant re-spins to rack up your winning potential.

It may not have the graphics of the latest slots, but Mermaids Millions really is a one-in-a-million slot game.

WHERE TO PLAY: Try it now at 32Red Casino.

Lord of the Ocean

lord of the ocean slot
Meet Poseidon himself in Novomatic’s Lord of the Ocean slot, which boasts a beautiful deep-sea theme with old submerged temples, Naiad and Poseidon as just some of the surprisingly eerie symbols.

As you’ve probably come to expect, the game includes a decent free spins feature. However, it’s the mini-game that really caught our interest – and kept us pretty engrossed. This offers you a chance to multiply your winnings thanks to the gamble button, in which you have to try and guess the colour of the card. Get it right and your prize multiplies and allows you the option to keep trying your luck.

Lord of the Ocean is atmospheric and really quite fun, with more than enough to keep the most ardent gamer coming back for more.

WHERE TO PLAY: Try it now at Genting Casino.


subtopia slot
NetEnt’s Subtopia allows you to live like Captain Nemo in the famous 20,000 Leagues under the sea, as you trawl the oceans in a vintage submarine.

The game features some odd symbols such as an engineer girl, a diver, a navigator girl, a captain wearing an eye patch, and some rather geeky looking chap holding a kind of treasure, who also happen to be the Wild.

The free spins round is where the action is as by collecting five scatter symbols can see your winnings multiply by a whopping 100 times.
For an engaging experience Subtopia delivers and takes underwater steampunk to the next level.

WHERE TO PLAY: Try it now at Videoslots Casino.

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