It only has one bonus feature and doesn't always work, so you usually only have to be scattered and wild to keep most of your rotation. It's a bit too calm and soft for us, and we prefer our mobile slot machines to be even more exciting.
The re-spinning bonus feature, coming soon, is the salvation grace of the Dolphin Reef. If you get wild dolphins on reels 2 and 4 at the same time, both reels will become extended Wilds and you will get 5 re-spins of the remaining reels. This is where the video slot really goes into it. The expanding wild animals are ocean pools, and the dolphins will jump from one expansive wild animal to another in a frenetic revelry.