Claim: The snowflake coral or branched pipe coral is a species of  soft invasive coral that was first detected in Hawaii in 1972 when it appeared in Pearl Harbor.
Evidence: 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 was first detected in Hawaii in 1972 when it appeared in Pearl Harbor.