Galapagos Species Database
The Galapagos Species Database shares the information about the species from our Natural History Collections.
Obelia oxydentata
Hidrozoo, Hydrozoa
Domain
Eukaryota
Kingdom
Animalia
Phylum
Cnidaria
Class
Hydrozoa
Order
Leptothecata
Suborder
Proboscoida
Family
Campanulariidae
Genus
Obelia
Species
oxydentata
Taxon category: Accepted
Origin: Introduced - established
Year of first record: 2016
Mode of introduction: Accidental
Introduction Pathway: Stowaway
Subpathway: Ship hull
Introduced status: Naturalized
Invasive status: Under watch
Distribution: Tropical Eastern Pacific: Panama and the Galapagos Islands in San Cristobal (Calder et al., 2021).
- Calder, D.R. Carlton, J. T., Keith, I., Larson, K., McCann, L., Geller, J., Wheelock, M., Choong, H. H. C., & Ruiz, G. M. (2021) Additions to the hydroids (Cnidaria, hydrozoa) of marine fouling communities on the mainland of ecuador and in the galapagos islands Aquatic Invasions, 16(2), 208–252. https://doi.org/10.3391/ai.2021.16.2.02
- Calder, D.R. Carlton, J. T., Larson, K., Mallinson, J. J., Choong, H. H. C., Keith, I., & Ruiz, G. M (2019) Hydroids (Cnidaria, Hydrozoa) from marine fouling assemblages in the Galápagos Islands, Ecuador Aquatic Invasions (2019) Volume 14, Issue 1: 21–58
- Carlton, J. T. Keith, I., & Ruiz, G. M. (2019) Assessing marine bioinvasions in the Galápagos islands: Implications for conservation biology and marine protected areas. Aquatic Invasions, 14(1), 1–20. https://doi.org/10.3391/ai.2019.14.1.01
- Horton, T. Horton, T., Kroh, A., Ahyong, S., Bailly, N., Boyko, C. B., Brandão, S. N., Gofas, S., Hooper, J. N. A., Hernandez, F., Holovachov, O., Mees, J., Molodtsova, T. N., Paulay, G., Decock, W., Dekeyzer, S., Poffyn, G., Vandepitte, L., Vanhoorne, B., Adlard, R., ... Zhao, Z. (2021) World Register of Marine Species. Available from https://www.marinespecies.org at VLIZ.
You are welcome to download and use the information found in this page, acknowledging its source.
This page should be cited as follows:
"Galapagos Species Database, Obelia oxydentata", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=18864. Accessed 31 October 2026.