Carijoa riisei is a species of  soft invasive coral of the Clavulariidae family that is native to the Indo-Pacific and was first detected in Hawaii in 1972 when it appeared in Pearl Harbor.
Animalia Kingdom: Phylum: Cnidaria Class: Anthozoa Order: Alcyonacea Family: Clavulariidae Genus: Carijoa Species: C. riisei Carijoa riisei, the snowflake coral or branched pipe coral, is a species of soft coral in the family Clavulariidae. It was originally thought to have been native to the tropical western Atlantic Ocean and subsequently spread to other areas of the world such as Hawaii and the greater tropical Pacific, where it is regarded as an invasive species. It has subsequently been shown through molecular evidence that it is more likely that the species is in fact native to the Indo-Pacific and subsequently spread to the western tropical Atlantic most likely as a hull fouling species prior to its original description. It was first detected in Hawaii in 1972 when it appeared in Pearl Harbor. 
