A survey of epibiont hydrozoans on .

The brown alga provides a natural substrate occupied by hydrozoans in shallow marine waters. A global count in 2007 listed 39 epibiotic species of Hydrozoa growing on , but more studies have been published since, therefore, an update is timely, particularly due to the increased abundance of in the Caribbean. This review, based on a recent literature survey and new records from Mexico, includes 133 publications of epibiotic hydrozoans on spanning 220 years, from 1802 to 2022.