Nanipora Miyazaki & Reimer, 2015 is a recently discovered genus of aragonite-skeleton producing octocorals closely related to the blue coral genus Heliopora de Blainville, 1830. Since its discovery, Nanipora has been reported from coral reefs in Okinawa, Japan, and Thailand, and from seagrass beds in the northern South China Sea. However, it remains little known and studied. Here, we report on the unexpected discovery of an abundance of Nanipora colonies in shallow waters less than 2-m deep around a CO2 vent from the uninhabited volcanic island of Iwotorishima, Okinawa, in southern Japan. Nanipora colonies were found covering both coral rubble and hard substrates, alongside a few soft coral and zoantharian species. Polyps were pale white in color with none brown or darker in coloration as in some recent reports. As the original description of N. kamurai from Zamami Island in Okinawa describes the species as azooxanthellate, as the current Iwotorishima specimens also appear to be, and recently reported specimens from Thailand, Dongsha Atoll, and Yaeyama are zooxanthellate, it may be that there are more than one Nanipora species; the type species N. kamurai that is also likely at Iwotorishima, and a zooxanthellate species that constitutes the other records. Although Nanipora is not well studied, its presence at this volcanic CO2 seep suggests it has the ability to survive under unique and extreme environmental conditions, rendering it as a potentially important subject of study in the face of increasing ocean acidification.
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Bock S (1938) The alcyonarian genus Bathyalcyon. KungligaSvenka Vetenskapsakademiens Handlingar (Tredje Serien) 16:1–54
Camp EF, Suggett DJ, Gendron G, Jompa J, Manfrino C, Smith DJ (2016) Mangrove and seagrass beds provide different biogeochemical services for corals threatened by climate change. Front Mar Sci 3:52
Colgan MW (1984) The cretaceous coral Heliopora (Octocorallia, Coenothecalia) – a common Indo-Pacific reef builder. In: Eldredge N, Stanley SM (eds) Living fossils. Springer-Verlag, New York, pp 266–271
Conci N, Wörheide G, Vargas S (2019) New non-bilaterian transcriptomes provide novel insights into the evolution of coral skeletomes. Gen Biol Evol 11:3068–3081
de Blainville HMD (1830) Zoophytes. In: Cuvier G-F (ed) Dictionnaire des Sciences Naturelles, dans lequel on traite méthodiquement des différens êtres de la nature, considérés soit en eux-mêmes, d’après l’état actuel de nos connoissances, soit relativement l’utilité qu’en peuvent retirer la médecine, l’agriculture, le commerce et les arts. Suivi d’une biographie des plus célèbres naturalistes. Ouvrage destiné aux médecins, aux agriculteurs, aux commercans, aux artistes, aux manufacturiers, et à tous ceux qui ont intérêt à connoître les productions de la nature, leurs caractères génériques et spécifiques, leur lieu natal, leurs propriétés et leurs usages. Tome soixantième. ZOOPH–ZYT. F. G. Levrault, Strasbourg et Paris/Le Normant, Paris, pp 1–546
Esper EJC (1805) Die Pflanzenthiere in Abbildungen nach der Natur mit Farben erleuchtet nebst Beschreibungen. Raspe, Nürnberg. Theilen 1–3, Lieferungen 13
Garra S, Hall A, Kingsford MJ (2020) The effects of predation on the condition of soft corals. Coral Reefs 28:1–5
Haddon AC, Shackleton AM (1891) Reports on the zoological collections made in Torres Straits by Professor A.C. Haddon, 1888–1889. Actiniae: I. Zoantheae. Sci Trans Royal Dublin Soc 4:673–701
Inoue S, Kayanne H, Yamamoto S, Kurihara H (2013) Spatial community shift from hard to soft corals in acidified water. Nat Clim Chang 3:683–687
Irei Y, Nozawa Y, Reimer JD (2011) Distribution patterns of five zoanthid species in Okinawa Island, Japan. Zool Stud 50:426–433
Lincoln Smith MP (1988) Effects of observer swimming speed on sample counts of temperate rocky reef fish assemblages. Mar Ecol Prog Ser 43:223–231
Miyazaki Y, Reimer JD (2015) A new genus and species of octocoral with aragonite calcium-carbonate skeleton (Octocorallia, Helioporacea) from Okinawa, Japan. ZooKeys 511:1–23
Miyazaki Y, Santos ME, Kunihiro S, Weinstein DK, Reimer JD (2016) Rarity of Nanipora kamurai (Anthozoa: Octocorallia: Helioporacea) at its type locality. Mar Biodivers 46:917–921
Moser J (1919) Beitrage zu einer Revision der Alcyonarien. 1. Die Gattungen Sarcophyton Lesson und Lobophytum Marenzeller. Mitteilungen Zoologisches Museum, Berlin, 9:219-294, Pls. 5-6
Plaza PU, Mehrotra R, Scott CM, Reimer JD (2018) Rare zooxanthellate Nanipora octocoral (Helioporacea) in the Gulf of Thailand. Mar Biodivers 48:1961–1967
Quattrini AM, Rodríguez E, Faircloth BC, Cowman PF, Brugler MR, Farfan GA, Hellberg ME, Kitahara MV, Morrison CL, Paz-García DA, Reimer JD, McFadden CS (2020) Palaeoclimate ocean conditions shaped the evolution of corals and their skeletons through deep time. Nat Ecol Evol 4:1531-1538
Reimer JD, Lau YW, Boo WH, Soong K (2018) Living fossil Nanipora (Anthozoa: Octocorallia) as the dominant calcifying benthos in a seagrass meadow in the South China Sea. Matters Select 4:e201802000001
Villanueva RD, Edwards AJ (2010) Butterflyfishes feed on externally brooded larvae of the blue coral, Heliopora coerulea. Coral Reefs 129:105
Wee HB, Kurihara H, Reimer JD (2019) Reduced Symbiodiniaceae diversity in Palythoa tuberculosa at a heavily acidified coral reef. Coral Reefs 38:311–319
Bayer FM, Muzik KM (1977) An Atlantic helioporan coral (Coelenterata: Octocorallia). Proc Biol Soc Wash 90:975–984
The authors thank the captain and crew of the Yosemiya III for their support and advice. The first author obtained permission for sampling from Okinawa Prefecture (Permit Number 2-34). Comments from two reviewers and the editor improved an earlier version of this manuscript.
The authors were supported by an OIST KICKS grant entitled “Japanese volcanic CO2 vents – natural laboratories to study the behavior and adaptation of marine organisms to acidifying oceans”, and by a JSPS Kakenhi grant to H. Kayanne (#16H01766).
Conflict of interest
The authors declare that they have no conflict of interest.
All applicable international, national, and/or institutional guidelines for animal testing, animal care and use of animals were followed by the authors.
Sampling and field studies
All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities and are mentioned in the acknowledgements, if applicable. The study is compliant with CBD and Nagoya protocols.
Specimens have been deposited in the Fujukan University of the Ryukyus museum under specimen numbers RUMF-ZG-04458~04462. No other data are present in this research.
JDR and all authors conceived and designed the research. JDR, H Kurihara, H Kayanne, and TR acquired funding. JDR, H Kurihara, YI, and MI conducted benthic surveys. JDR identified specimens and wrote the first draft of the manuscript. All authors read, edited, and approved the manuscript.
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Reimer, J.D., Kurihara, H., Ravasi, T. et al. Unexpected high abundance of aragonite-forming Nanipora (Octocorallia: Helioporacea) at an acidified volcanic reef in southern Japan. Mar. Biodivers. 51, 19 (2021). https://doi.org/10.1007/s12526-021-01165-0
- Ocean acidification
- CO2 vent
- Ryukyu Islands