Sun corals of the Genus Tubastraea get their name from their bright yellow coloration and sun-like appearance of each polyp. Despite their bright sunny name, these corals are non-photosynthetic which means they do not get any energy from the light. In fact, they are probably the most well-known non-photosynthetic coral in the hobby. Their popularity is rooted both in their beautiful appearance as well as the challenge to keep them alive and thriving.