Dolphin's Treasure
The game by Aristocrat system developers, 3x5 reel, 20 pay lines, wild, free games.
You can see another development by Aristocrat platform in "dolphin" game collection. The slot works on 5 reels, each having 3 rows. 3 or more Scatter symbols give access to 15 free games, wins will be tripled. Wild substitutes all symbols on the reel, except Scatter, and doubles a win for a spin, in which it appeared.