First detection of the alien snowflake coral Carijoa riisei (Duchassaing and Michelotti, 1860) (Cnidaria: Alcyonacea) in the port of Manzanillo in the Mexican Pacific.
One colony of the snowflake coral Carijoa riisei (Alcyonacea: Clavulariidae) was found in June 2016, and three more in January 2017, during dives in the port of Manzanillo, Colima, Mexico (Tropical Eastern Pacific). This species was considered as native to the tropical Western Atlantic and invasive in the Pacific, but recent studies suggest that it is native to the Indo-West Pacific. Colonies were found and collected from artificial substrates in the port. A total of 29 species of invertebrates of five different phyla were associated with the colonies of C. riisei. Moreover, the octocoral was found as an epibiont on the architect crab Pelia tumida. Our observations suggest that the invasion of C. riisei in Manzanillo is in an early stage and that on-going monitoring and implementation of an eradication plan is necessary before its distribution is increased.