Several species of jellyfish look like the one in our Cute Blue Jellyfish cursor pack. Some examples of blue jellyfish include the blue blubber jellyfish, the bluefire jellyfish, and the crystal jellyfish. Blue jellyfish may have pigments called carotenoids or flavins that give them their blue color, and they may also have structures in their tissues that scatter blue light. It's worth noting that the color of a jellyfish can vary depending on its age, the environment, and other factors.