The slot almost breathes ocean freshness, just turn it on, you will definitely feel it. The quality of this online free slot surpasses all expectations, as it seems that each inhabitant of the underwater depths is actually looking at you from the screen!However the online casinos in the grid above all have it in the download version of their casino and more often than not allow bets of up to 12.50 a spin.So I was playing Great Blue one day (I mostly used to play it at Omni Casino - more info on AZOC 's safe online casinos list ) when I got a bit of a shock!And among this serenity, with the peace of mind and a relaxed body, you can win large sums of money while playing this slot machine, which was specially designed for a pleasant stroll with marine dolphins, whales and other underwater inhabitants.This usually applies to both the download and Flash version of the game where applicable. Obviously they might change but I'll check back every now and again. Note that although currencies below are in US, theGBP and Euro equivalents are in place.Enjoy your underwater adventure!The first thing you notice when you load up The Great Blue, is the unforgettable soundtrack, with the lifelike sounds of the ocean, which will transport you to the underwater world, ruled by peace and tranquillity.There are a handful of Playtech slots that really grab me. One is the visually superb. Gladiator Slot but in terms of gameplay, the Great Blue slot is my absolute favourite.Had to re-open it and start from where I left off. Just a quick reminder though that Great Blue is a very volatile slot. You can go a long time without the free spins and sometimes even when you get them you only get 20x.Grand Reef - / 5.00 Ladbrokes Casino - / 12.50 Omni Casino - / 7.50. Paddy Power - / 12.50 Tote Casino - / 12.50 William Hill Casino - / 25.00 12,500 HIT ON GREAT BLUE!It was already going well - I was on 1,431 when on the 13th spin this beauty below landed for 11,250! I grabbed the screenie mid-countup but you can see the full amount of this hit right at the bottom of the screen.I was about 150 away from going bust when I hit the free spins. The clams opened up for the best possible combo - 15 extra spins and an 8x multiplier giving me a total of 23 spins at 10x.I started with 200 and hit some decent free spins on the Fantastic 4 slot before going into freefall. So I just thought " to hell with it - you win some, you lose some " and upped my bet to 12.50 to finish off.