beautiful corals and underwater plants accompanied by small fish that amaze the eyes

Coral reefs are a group of coral animals that live in symbiosis with a type of algae plant called zooxanthellae.[1] Coral reefs are included in the phylum Cnidaria class Anthozoa which have tentacles.[1] The class Anthozoa consists of two subclasses, namely Hexacorallia (or Zoantharia) and Octocorallia, both of which are distinguished by origin. Morphology and Physiology.[2]