The Pomacentridae family, commonly known as damselfish and clownfish, is a diverse group of small to medium-sized marine fish found primarily in tropical and subtropical oceans with 30 genera and 424 species worldwide. Members of the Pomacentridae family typically have compressed bodies and large, rounded fins. Their coloration is often bright and varied, including blues, yellows, oranges, and blacks, which can serve both for camouflage and communication. Most species are relatively small, usually ranging from 3 to 15 cm (1 to 6 inches) in length, although some species can grow larger. They are commonly found in shallow coastal waters, particularly around coral reefs, rocky areas, and seagrass beds. These fish are primarily herbivorous, feeding on algae and small invertebrates. Some species, like clownfish, have a symbiotic relationship with sea anemones, gaining protection while helping to keep the anemones clean. Many damselfish are known for their territorial nature, often establishing and defending small territories against intruders. They can be found in small groups or as solitary individuals, with some species displaying complex social behaviors.