The hagfish, Eptatretus burgeri (Girard), is found in shallow water (6 to 9 m depth) at Moroiso Bay and Koajiro Bay near the Misaki Marine Biological Station (35°09'18″N, 139°36'54″E) throughout the year, save 4 months (July, August, September, and October).The eggs grow while the fish are in shallow water beginning in October and reach about 19mm by the end of June in the following year.In June the fish migrate to water of about 50m depth, where they probably spawn.In October the fish (at total length of more than 35cm) migrate to shallow water, but those less than 34cm remain at a depth of about 50m.In migrating both from shallow to deep water and the reverse, larger fish move first followed by smaller ones, but only fish over 35cm in length take part in the migration.Only 2 of 512 specimens were found to have ova in the testis.Eptatretus burgeri is not hermaph-roditic.There is no difference in total length between sexes of adult fish.
Tarletonbeania taylori Mead is a boreal species widely distributed in the northern North Pacific Ocean.This species, however, has not been recorded from Japan Sea, Okhotsk Sea and Bering Sea.Four specimens ranging 24.8 to 31.2 mm in standard length, were stranded on the beach of Miho Key in Suruga Bay, Shizuoka Pref., on March 24th, 1971.Characters of these specimens match well with those of specimens reported from other localities.This record is the first one in Suruga Bay, and the southernmost record of the species. Other fishes stranded on the beach with these specimens were lanternfishes, Myctophum orientale, Myctophum obtusirostrum, and gonostomatid fishes, Vinciguerria nimbaria and Maurolicus muelleri. The axis of the Kuroshio Current ran farther off the coast of southern Honshu in 1971 than in the same season of 1969 and 1970, because of the presence of a large cold water mass.The Oyashio Current was more powerful than the Kuroshio in the region of Choshi and adjacent waters in 1971.It is suggested that the lanternfish, Tarletonbeania taylori, penetrated into Suruga Pay from north, the region of Choshi, Chiba Prefecture.
A hypodermic tumor found in the caudal peduncle of a goldfish.Carassius auratus (Linnaeus), was histologically investigated.The tumor is composed of tumor cells and fibers.The latter consists of two kinds: one is thick and the other is fine.The tumor capsulated by the connective tissue is not infiltrative to muscle tissue.The tumor is regarded to be a fibroma.