Aquarium HD

Aquarium HD looks through transparent reels into an underwater scene, so the marine backdrop stays visible on every spin. WorldMatch fills the five reels, three rows and 25 adjustable paylines with a starfish, a turtle, seahorses, a clam and corals, and keeps the controls in an easy bar below.

Two features break up the base game. Three bonus icons start a pick round in which you choose 6 of 12 fish to reveal prizes, and free spins symbols pay up to 100x the total bet and award 12 free games with all wins doubled. The RTP is 94.09 %, volatility is medium and stakes run from 0.01 € to 12.5 €, with a top win of 4000 €. It is a calm, colourful slot for low and mid-stakes players.

Choose a bet level from 0.01 to 1 per line and play 1, 5, 10, 15 or 25 lines. Three or more matching symbols on a line pay out. The starfish is the top symbol, paying 200 coins for three and 2000 coins for five.

• Wild: substitutes for the regular symbols but not the bonus and free spins symbols, and has no payout of its own.
• Fish bonus: three bonus icons anywhere, then the start-bonus button. Pick 6 of 12 fish to reveal your prizes; the rest are shown afterwards.
• Free games: three or more free spins symbols award 12 free games with a 2x multiplier, and the symbol pays up to 100x the total bet.