Two New Species of the Genus Haliclona from Korea Author Kim, Hyung June Department of Taxonomy and Systematics, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea & https: // orcid. org / 0000 - 0002 - 9798 - 2703 Author Kang, Dong Won Department of Taxonomy and Systematics, National Marine Biodiversity Institute of Korea, Seocheon 33662, Korea text Zootaxa 2020 2020-12-02 4890 2 289 295 journal article 9396 10.11646/zootaxa.4890.2.10 70870cc8-4ef5-4816-981f-b0dce3b2c118 1175-5326 4301801 6DF0D703-1636-4B3A-AC33-9D3AE816B7EF Haliclona ( Reniera ) oceanus sp. nov. ( Fig. 2 A–G, Table 2 ) Material examined. Holotype . Korea , Jeju-do , Seogqipo-si , Daejeong-eup , Ieodo Ocean Research Station , 25 m depth , June 30, 2017 , SCUBA , coll. Sang-Hui Lee , MABIK IV00168257 . Description . Shape ( Fig. 2A ): Thickly encrusting to massive, with slightly elevated oscular rims, 2.5–3 cm in thickness and 8 × 7 cm in width. Oscula : 0.3–0.7 cm in diameter, scattered on surface. Colour : Gray in life which gradually changes to dark ivory in alcohol. Texture : Soft, fragile, and compressible. Surface : Smooth and even. Skeleton ( Fig.2 D–G): Ectosomal skeleton, detachable, tangential, unispicular isotropic reticulation of single spicules with spongin. Choanosomal skeleton, isotropic to ladder-like reticulation by unispicular primary lines regularly connected by unispicular secondary lines. Spicules ( Fig. 2 B–C): Two size categories of oxea, no microscleres. Large oxea 190–230 × 7–15 μm in size. Small oxea 70–100 × 2.5–5 μm in size. Distribution. Only found in Ieodo Ocean Research Station at depth of 25 m . Etymology. Named after from the locality, Ieodo Ocean Research Station, Korea . Remarks. Haliclona ( Reniera ) oceanus sp. nov. is similar to H . ( H .) ieoensis Kim et al . 2017 in shape, habitat, growth form, but it differs in color, ectosomal, choanosomal skeleton and spicule size. The ectosomal skeleton of H . ( H .) ieoensis is not specialized. It is reticularly arranged by unispicular oxea. However, ectosomal skeletal structure of H . ( R. ) oceanus sp. nov. arranged by unispicular isotropic reticulation of single spicules. The size of the oxeas of H . ( H .) ieoensis is larger than that of H . ( R. ) oceanus sp. nov. ( Table 2 ). TABLE 2 .The comparison of characters between Haliclona ( Reniera ) oceanus sp. nov . and H . ( H .) ieoensis Kim et al . 2017.