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Nakamura, M; Keys to the Freshwater Fishes of Japan Fully Illustrated in Colors (2) Katsutoshi Watanabe (1)

Description: Dorsal spines (total): 1; Dorsal soft rays (total): 6-7; Anal spines: 0; Anal soft rays: 14 - 16. Resembles Tachysurus nudiceps in having a slightly notched posterior caudal fin margin, but distinguished by having a shorter body and fewer fin rays. Three nominal species have been described for the bagrid genus of Coreobagrus i.e. C. brevicorpus Mori,1936, C. ichikawai Okado & Kubota, 1957 and C. okadai Jayaram, 1966. C. brevicorpus and C. ichikawai are confined to small geographic ranges in Korea and Japan, respectively. C. okadai was described from four specimens obtained from the Susuka River, which is within the distribution range of C. ichikawai and may be this species. Etymology: The genus name Coreobagrus: Greek, Corea, alternate spelling of Korea, referring to country where C. brevicorpus is endemic, i.e., a Korean bagrid. The specific name ichikawai: in honour of Atsuhiko Ichikawa (1904-1991), Hokkaido University, the junior author’s “venefactor” [sic, benefactor] in college. Remarks: Coreobagrus ichikawai is restricted to a region around Ise and Mikawa Bays in Honshu, Japan. It has an extent of occurrence (EOO) of 12,100 km2 and the population is severely fragmented. Dam construction, river channelisation, water pollution and disease have caused declines in the subpopulations of this species. It is also threatened by competition with its closely related species, Tachysurus nudiceps. Therefore, it is assessed as Vulnerable (IUCN 2018).

Nekogigi, Stumpy Bullhead

Pseudobagrus ichikawai

Bagridae

Asia: Japan, endemic to the streams in the Mie Prefecture, Honshu Island. Type locality: Miya River, Mie Prefecture, Japan.

11.0cm (4¼ins)

24-27°C (75-81°F)

6.5-7.0.

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Katsutoshi Watanabe, Seiichi Mori, Makoto Nagoshi, Sang-Rin Jeon, Yoshitaka Shimizu; 1992, Morphological differences between Two bagrid catfishes,Coreobagrus ichikawai and C. brevicorpus.
Kottelat, M. 1996. Pseudobagrus ichikawai. In: IUCN 2013. IUCN Red List of Threatened Species.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.