The Wild Dolphin bonus round is played on the reels. The feature type is a 'pick a box'. It means that you pick one of the items in the bonus game to win bonus. In the Wild Dolphin bonus round you will pick one of three dolphins to reveal up to 4x multiplier value.
There is Dolphin Coast Logo in Dolphin Coast Slot. It's wild and bonus symbol at same time. If you hit winning combination where one of the symbols will be Dolphin Coast Logo on reel 3, The Wild Dolphin bonus round will be activated.