Claim: Carijoa riisei 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 first detected in Hawaii in 1972 when it appeared in Pearl Harbor. It is now thought to be invasive throughout its entire range in the western Atlantic Ocean.