Dolphin’s Pearl Deluxe slot

Dolphin’s Pearl Deluxe slot machine at a glance

Dolphin’s Pearl Deluxe is an underwater-themed video slot from Novomatic, the Austrian company founded by Johann Graf in 1980 and best known for casino-floor cabinets. Online it is distributed by Greentube, which became part of the Novomatic Group in 2010. The game sits on a standard five-by-three window and pays across ten fixed lines. Sea creatures and card values make up the pay symbols, with the dolphin as wild and a pearl in an oyster as scatter.

Its age shows in its structure. There are no cascades, no collect symbols and no jackpot ladder. That makes it one of the easier slots to understand fully, which is a good thing: when you know exactly where a game's return comes from, you can judge its cost honestly.

How a spin works on Dolphin’s Pearl Deluxe

The random number generator chooses a stopping position for each of the five reels the moment you press start. The game then animates the reels to that result. A line pays when three or more matching symbols sit on it from the left, and the payout is a multiple of the line bet (your total stake divided by ten).

1. Set a total stake; each of the ten lines gets a tenth of it.
2. Press start. The outcome is fixed straight away.
3. The game checks every line for matching symbols from reel one.
4. Any line with a dolphin in it is paid at double value.
5. Pearls are counted anywhere on screen and paid on the total stake.
6. Three or more pearls also start the free spins round.

The dolphin wild: how doubling changes the maths

The dolphin is a wild symbol with a twist: as well as standing in for other symbols, it doubles any line win it is part of. Five dolphins on a line also pay as a symbol combination in their own right, at the top of the paytable. This one rule shifts a lot of the game's value onto lines that include the wild.

A worked example shows the effect. Assume a £1 stake (10p per line) and that four of a mid-value symbol pays 25 times the line bet. The numbers are illustrative, so read the paytable for the real ones.

The doubling applies once per line regardless of how many dolphins help; two wilds on one line don't make it four times. Whether the doubling stacks with the free spins multiplier is set out in the rules of the version you open, so read that section rather than assuming. Our wild multipliers page shows how other games handle the same idea.

Dolphin’s Pearl Deluxe free spins and bonus

Three or more pearl scatter symbols anywhere on the reels pay a scatter win and start the free spins round. During the round, all wins are multiplied, and landing more pearls adds spins to the total. The paytable lists the number of spins awarded and the multiplier used. The round plays at the stake that triggered it, and it ends with a single total for the whole bonus.

A bonus multiplier makes the dolphin even more important. A dolphin-assisted line in the bonus is the main way this game produces its larger results, which is the heart of its high volatility: most of the time the round is modest, and occasionally it delivers a big one.

In Great Britain you can't pay to go straight into the bonus. The pearls are the only trigger, because games supplied here don't include a feature buy; see bonus buy in the UK.

Dolphin’s Pearl Deluxe RTP and the cost of a session

The Dolphin’s Pearl Deluxe RTP is 95.13%, which leaves a 4.87% house edge. Put another way, £100 staked over a long run returns £95.13 on average. Because UK rules require at least 2.5 seconds per spin, the most spins anyone can play in half an hour is 720. The table turns that into pounds, which is often a more useful way to plan than counting spins.

Most people spin more slowly than the maximum, so the real staked total is usually lower. But a high-volatility game can swing well beyond these averages: losing the full amount staked is a normal outcome for a session. A session budget set before you start, and a deposit limit in the casino, keep the cost where you planned it.

Dolphin’s Pearl Deluxe max win at UK stakes

No verified max win figure is held for Dolphin’s Pearl Deluxe, so we don't publish one. The help screen of the version you play is the place to look. In practice the biggest results come from five dolphins, or dolphin-assisted top-symbol lines, during the multiplied free spins. Whatever the ceiling, UK stake rules bound it: £5 a spin for players aged 25 and over since 9 April 2025, and £2 for 18 to 24-year-olds since 21 May 2025, as explained in the Gambling Commission's stake limit guidance (opens in a new tab).

UK rules that shape the Dolphin’s Pearl Deluxe slot

When the game first appeared in 2009, quick spins and autoplay were standard. The British version today is different. Since 31 October 2021, the Gambling Commission's RTS 14 on responsible product design (opens in a new tab) has required online slots to drop autoplay, run each spin for at least 2.5 seconds, remove turbo and slam-stop, stop celebrating returns that don't exceed the stake, and show a running net position. See the spin speed rule for how the 2.5 seconds is measured.

The net position display is especially useful on a game like this, where a doubled line can feel like a win even when the session as a whole is down. Keep an eye on it rather than on individual results. The net position rule explains what must be shown.

Is there a gamble feature on Dolphin’s Pearl?

Classic Novomatic games often include a red-or-black card gamble after a win. Whether it appears in the version you open depends on the casino and the game build. If it is there, remember that a fair double-or-nothing guess leaves the average return unchanged while making results lumpier, so it is purely a matter of taste. Collecting every win is a perfectly sensible default.

Is the Dolphin’s Pearl Deluxe slot worth playing?

It suits adults who prefer a game they can read at a glance and who accept a higher house edge in exchange for simplicity. If the RTP matters more to you, compare it with other options on our high RTP slot machines page first.

Slots similar to Dolphin’s Pearl Deluxe

Lucky Lady's Charm Deluxe shares the same ten-line frame and multiplied bonus with a different theme. Lord of the Ocean keeps the sea but uses an expanding symbol instead of a multiplier. For a modern take on water themes, Big Bass Bonanza and the other fishing slots use money symbols and a fisherman collector. All are listed in our slot machines hub.

Dolphin’s Pearl myths that don't hold water

• A dolphin on reel one doesn't make a win more likely on the next spin. Each result is drawn fresh.
• The game isn't hot after a bonus. There is no such state; see loose and tight slot machines.
• Stopping a spin early wouldn't help even if you could. The result exists before the reels move.
• A bigger stake doesn't trigger the pearls more often. Only the pound value of results changes.

Dolphin’s Pearl Deluxe demo and RTP check

Most UK casinos offer free demo play of Dolphin’s Pearl Deluxe, after age verification, which has been required for demos since May 2019. It is the cheapest way to watch how often the dolphin turns up and how the bonus plays. To confirm the RTP, follow these steps:

1. Open the game and press the information or menu button.
2. Go to the rules pages and find the line for theoretical return.
3. Compare the figure with 95.13%; a lower one is a different setting.
4. Read the bonus page for the number of free spins and the multiplier.
5. Read the wild rules to see whether doubling stacks with the bonus multiplier.

Where to play Dolphin’s Pearl Deluxe online

We can't promise any casino carries the game, because lobbies change, so search the casino's game list for Dolphin’s Pearl Deluxe before depositing. None of our partner offers uses this slot. New Coral Casino players who deposit and bet £10 on slots get 100 free spins at 10p each on selected games; winnings from them have no wagering, and the spins last 7 days. At Ladbrokes Casino, £10 of slots play brings 50 free spins a day for 10 days (500 in total), at 10p each on selected games and with no wagering. PlayOJO gives 80 free spins on Big Bass Bonanza, 10p each with no wagering, for a first deposit of at least £10. All three are 18+, terms apply and some payment methods are excluded. If gambling is affecting your health, the NHS gambling support page (opens in a new tab) lists specialist clinics.

18+. Gambling should be entertainment that costs money, not a way to make it. Decide a budget before you play: plan a slot budget. Free, confidential help: National Gambling Helpline 0808 8020 133.