Coral biology is the study of the anatomy, physiology, ecology, and genetics of corals, which are marine invertebrates belonging to the phylum Cnidaria. Corals are known for their symbiotic relationship with algae, which provides them with essential nutrients through photosynthesis. Research in coral biology focuses on understanding the biology and ecology of corals, their response to environmental stressors such as climate change and ocean acidification, as well as their role in reef ecosystems and biodiversity. Scientists also study coral reproduction, growth, and genetic diversity to inform conservation efforts and management of coral reef ecosystems.