Bull. Jpn. Soc. Fish. Oceanogr. 70(3), Page 176-179, 2006   Species composition and catch of loliginids, Nipponololigo (Loliolus) japonica, N. sumatrensis and N. beka, caught by commercial small trawl nets Masayuki Yamamoto1* and Yutaka Natsukari2 1 Kagawa Prefectural Fisheries Experimental Station, 75-5 Yashima-higashi, Takamatsu, Kagawa 761-0111, Japan 2 Faculty of Fisheries, Nagasaki University, 1-14 Bunkyo Nagasaki, Nagasaki 852-8521, Japan * e-mail: ky0554@pref.kagawa.lg.jp We examined species composition and catch of the small loliginid squids (Mullusca: cephalopoda) caught by small trawl net fishery in Bisan-Seto, the central Seto Inland Sea from May 2000 to March 2002. The mantle lengths of the specimens ranged between 25.0 and 102.7 mm, and the mode was 72.5 mm. Loliginid squids consisted of Nipponololigo (Loliolus) japonica (percentage in weight: 15.2%), N. sumatrensis (71.0%) and N. beka (13.8%), and the dominant species was N. sumatrensis. Through our investigation on landing records of Aji Fisheries Cooperative Association, it was estimated that the catch of the squids at 24.8 t in year occupied approximately 2% of total catch of the small trawl net fishery of the association. Key words: loliginid squid; Nipponololigo; small trawl net; the Seto Inland Sea