First records and new information on the associations of echinoderms with other phyla in the rocky reefs of northern Chocó, Colombian Pacific.

Rocky reefs of the northern Colombian Pacific (Chocó) are diverse ecosystems that are poorly studied. Echinoderms are one of the principal groups in these ecosystems with associations to different species, including benthic organisms in which they live and other species that use them as hosts. These relationships include fishes, sponges, seaweeds, cnidarians, polychaetes, bryozoans, crustaceans, mollusks, and other echinoderms. For this area, 22 associations were registered, including commensalism, epibionts and parasitism. This work constitutes the first report for the associations of with Suberites aff. ficus, with , and Holothuria (Thymiosicia) impatiens with . Associations of with , and with Malmgreniella cf. variegata are new records for Colombia. This work also expands the range of hosts previously described for and expands the distribution of the association between and Echineulima cf. robusta.