Reimer J. D. auteur aut IRD Agostini S. auteur aut IRD Golbuu Y. auteur aut IRD Harvey B. P. auteur aut IRD Izumiyama M. auteur aut IRD Jamodiong E. A. auteur aut IRD Kawai E. auteur aut IRD Kayanne H. auteur aut IRD Kurihara H. auteur aut IRD Ravasi T. auteur aut IRD Wada S. auteur aut IRD Rodolfo-Metalpa Riccardo auteur aut IRD text journalArticle eng text/pdf born digital access Whilst natural analogues for future ocean conditions such as CO2 seeps and enclosed lagoons in coral reef regions have received much recent research attention, most efforts in such locations have focused on the effects of prolonged high CO2 levels on scleractinian corals and fishes. Here, we demonstrate that the three species of zooxanthellate zoantharians, hexacorallian non-calcifying "cousins" of scleractinians, are common across five coral reef natural analogue sites with high CO2 levels in the western Pacific Ocean, in Japan (n = 2), Palau, Papua New Guinea, and New Caledonia (n = 1 each). These current observations support previously reported cases of high Palythoa and Zoanthus abundance and dominance on various impacted coral reefs worldwide. The results demonstrate the need for more research on the ecological roles of zooxanthellate zoantharians in coral reef systems, as well as examining other "understudied" taxa that may become increasingly important in the near future under climate change scenarios. Given their abundance in these sites combined with ease in sampling and non-CITES status, some zoantharian species should make excellent hexacoral models for examining potential resilience or resistance mechanisms of anthozoans to future high pCO(2) conditions. specialized Palythoa Zoanthus Ocean acidification Semi-enclosed bays CO2 seeps PACIFIQUE NOUVELLE CALEDONIE JAPON PAPOUASIE NOUVELLE GUINEE MICRONESIE 034 [Early access] [9 p.] 2023 0722-4028 https://www.documentation.ird.fr/hor/fdi:010087603 10.1007/s00338-023-02381-9 0722-4028 [F B010087603] https://www.documentation.ird.fr/hor/fdi:010087603 https://www.documentation.ird.fr/intranet/publi/2023-06/010087603.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2023-06-30 2023-06-30 fdi:010087603 fre