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Descriptive notes:
Adulte attain about 30 cm in body length.
lËËËÀÔ‘CÆ < %ËL'CVä.
Body elongated and considerably compressed.
lËÀZ ( %ËL'CbÔ.
Scales easily removed.
ËÊÊÎ '
Lower jaw somewhat longer than upper; teet‘h very small.
Behind dorsal and caudal fins, there are six small fins.
Color of dorsal surface leaden blue, ventral surface,
silver—white.
Swim in schools in the waters of offing.
Have positive
phototaxis.
Eat small marine animals such as zooplankton located by
means
of eyesight.
Extent of migration Wide.
Swimming movement quick.
Distribution extends from the waters of Kuril lslands to the
neighborhood of Goto lslands of Kyushu.
Bulbus olfactorius very smallénd .closely adhered to small
lobus olfactorius.
Lobus opticus enormously large, and its
lateral surface extremely expanded with fovea.
_
Corpus cerebelli well-developed, especially elongated
posteriorly.
Eminentia granularis is egg-shaped and large.
Medulla oblongata comparatively small.
.