Rosbin coral

There are a total of 18 species in the cup-shaped coral genus. It is a single or collective animal of the hydra type, with a body that is symmetrical in two radiations of six parts. The oral wall is invaginated to form an oral canal, and the endoderm of the gastric cavity wall extends towards the center to form a diaphragm. Muscles are well-developed, and there are cells present in the mesoderm. Reproductive cells originate from the endoderm and can form bones. Seafood, group, with bones, can be used to build reefs, and the presence of oral channels makes its body appear two radiative symmetries. With a diaphragm, the diaphragm can support an increase in digestive area. The diaphragm filaments have prickly cells, and both the inner and outer layers have prickly cells. The reproductive glands originate from the endoderm. The color is usually brown, pink, or yellow. Distributed from the Indian Ocean to the Pacific Ocean.