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:
↑Nonaka, 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.