The paper deals with the embryonis development of Abramis broma Orientalis Berg.The fertilized eggs of Abramis brama Orientalis Berg are spheroid in shape.They are 1.6～1.7mmin diameter

containing a large quantity of yolk.At the water temperature of 23.5～26.5℃

36 minutes after fertilization egg plusm begins toconcertruter towerds the animal pole of the egg and forms a raddish blastoderm.17 minutes after fertil-ization

it undergoes the first cleavag

1 hour and 39 minutes

it is the morula stage.2 hours and 12minutes after fertilization

blastodermal cells reaches the blastula stage.4 hours and 49 minutes after fertilization

the blastomers wrap downwards.This is the beginningof the gastrals stage.8 hours and 10 minutes after fertilization

the blastomers wrap downwards over 4/5 of yolk

withneural groove forming on th dorsul po(?)l of embryo.10 hours and 10 minutes later

body segment occur in the mid-part of embryo.11 hours and 45 minutes later fertilization

optic vesicles appear on both side of the fore brain.13hours and 23 minutes after fertization

the tail becomes moveable

19 hours and 45 minutes after fertil-ization

embryonis body begins to wriggle.24 hours and 13 minute after fertilization

heart is to pul-sate

8 hours and 30 minutes later

embryoes hatch out.The favourable water temperature for embryonic development of Abramis brama orentalis Berg is18～20℃

when tho temperature is higher than 20℃

embryonis development become shorter thanstanstill.