It is well done, but there is still something off about it from a logo perspective. I think perhaps its the fact that it doesn't have a distinctive, defined shape. As a result, it probably wouldn't read well at smaller sizes. All the colors will just blur together and it won't look much like anything. If you used the same front portion, and cleaned up the back end to create a more distinctive "dolphin" shape, I think it would work well. And ditch the orange eye... It doesn't make the dolphin look meaner, it makes it look like a Power Ranger.