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A new ogcocephalid fish, Dibranchus japonicus, from Japan.
Kunio Amaoka and Mitsugu Toyoshima

Mating habits of the surfperch, Ditrema temmincki.
Akinobu Nakazono, Yutaka Tateda and Hiroshi Tsukahara

Redescription of the stichaeid fish Chirolophis saitone.
Masaru Shiogaki

The ultrastructure of spermatozoa with a note on the formation of the acrosomal filament in the lamprey, Lampetra japonica ‚P ‚Q.
Haruo Jaana and Tadashi S. Yamamoto

Periodic nocturnal activities in the catfish Silurus asotus in captivity.
Kazuo Mashiko

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Bluefin tuna, Thunnus thynnus orientalis, from the Gulf of Papua.
Bruce B. Collette and B. R. Smith

A rare myctophid fish, Diaphus bertelseni, from the stomach of Bryde's whale captured in the subtropical western North Pacific.
Kouichi Kawaguchi and Akito Kawamura

Direct evidence for oophagy in thresher shark, Alopias pelagicus.
Tsuguo Otake and Kazuhiro Mizue

Karyotype of tetraploid origin in a tropical Asian cyprinid, Acrossocheilus sumatranus.
Atsushi Suzuki and Yasuhiko Taki

Development of the secondary lamellae in the olfactory epithelium of Anabas testudineus.
Asad Rafi Rahmani and Sardar Mahmood Khan

First record of the scorpaenid fish Brachypterois serrulatus from Japan, with a key to Japanese genera of the Pteroinae.
Tsutomu Kanayama and Kunio Amaoka

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