Dolphin Template for Flip Book - Version 1.0 Dolphin Theme for Flipping Book Publisher for PDF Pro are 100% free here! This free theme is about Dolphin, which is a kind of marine mammals closely related to whales and porpoises. They are cute and understand human nature. They will not attack human beings at first. Most people play games with those cute and lovely dolphin in the water. You can download this free theme and have a lot of fun!