Hemicorallium is a genus of octocorallid corals that belongs to the family Coralliidae. They are found in the Pacific and Atlantic Oceans.
Distribution Members of this genus are distributed across both the Pacific and Atlantic Ocean’s. They tend to inhabit particularly deep waters. Most species seem to originate in the Pacific around Hawaii and the Sea of Japan. There is a notable lack of species from the Indian Ocean.
Taxonomy The taxonomy of genus Hemicorallium has undergone multiple resurrections and reorganisations with further need for reclassification possibly needed.
Species There are currently 26 described species within this genus. However there may be many undescribed species due to their hard to access deep water habitats allowing for poor sampling opportunities. A list of species can be found below:
Hemicorallium abyssale Hemicorallium aurantiacum Hemicorallium bathyrubrum Hemicorallium bayeri (Simpson & Watling, 2011) Hemicorallium boshuense (Kishinouye, 1903) Hemicorallium ducale (Bayer, 1955) Hemicorallium guttatum Tu, Dai & Jeng, 2016 Hemicorallium halmaheirense (Hickson, 1907) Hemicorallium imperiale (Bayer, 1955) Hemicorallium indicodensum Hu, Zhang & Xu, 2025 Hemicorallium jiaolongensis Hu, Zhang & Xu, 2025 Hemicorallium kaiyo Nonaka & Hayashibara, 2021 Hemicorallium laauense (Bayer, 1956) Hemicorallium maderense (Johnson, 1898) Hemicorallium meraboshi Nonaka, Hanahara & Kakui, 2023 Hemicorallium muzikae Nonaka & Hayashibara, 2021 Hemicorallium niobe (Bayer, 1964) Hemicorallium regale (Bayer, 1956) Hemicorallium reginae (Hickson, 1905) Hemicorallium ryukyuense Nonaka, Takata & Yasuda, 2025Nonaka, Masanori & Takata, Kenji & Yasuda, Nina. (2025). A New Species of the Genus Hemicorallium (Cnidaria: Octocorallia: Scleralcyonacea: Coralliidae) Collected from Okinawa Island. Species Diversity. 30. 193-206. 10.12782/specdiv.30.193. Hemicorallium sulcatum (Kishinouye, 1903) Hemicorallium taiwanicum (Tu, Dai & Jeng, 2012) Hemicorallium tokiyasui Nonaka & Hayashibara, 2021 Hemicorallium tricolor (Johnson, 1899) Hemicorallium variabile (Thomson & Henderson, 1906) Hemicorallium osmanthogemmum Tatsuki Koido, 2026
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