Abstract
Sagami Bay and Suruga Bay harbor a rich marine biodiversity; however, their outer-shelf scleractinian coral fauna has not been characterized to date. Scleractinian corals were collected by dredge sampling of the Japanese Association for Marine Biology (JAMBIO) Coastal Organisms Joint Surveys in 2015 to elucidate the diversity of azooxanthellate scleractinian corals from the outer shelf zones of Sagami Bay and Suruga Bay. In this study, a total of 1291 azooxanthellate scleractinian specimens were collected, corresponding to 23 genera and 18 species, five of which are new records for Sagami Bay and eight are new records for Suruga Bay. Moreover, in all localities, except sampling locality (SL) 8, more than 70% of the specimens showed asexual reproduction. This finding suggests that asexual reproduction may play an important role in increasing the coral population size in soft-substrate environments of the outer shelf.
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