Abstract
Osteobrama belangeri (Valenciennes) is a highly prized endemic medium carp available in Yunan province of China, Myanmar and Manipur (North Eastern part of India). The fish attains sexual maturity in 2+ years (200 - 25 g. body weight). Investigation of the fine structure of the egg envelope and micropyle of unfertilized spawned eggs of Osteobrama belangeri using Scanning Electron Microscope (SEM) was made. The surface of the egg membrane showed regularly arranged pores. The micropyle is a type II consisting of the flat pit with diameter of micropyle 11 µm to 12 µm and a long canal narrowing into a distinct canal. The surface of zona radiata was rough with a uniform distribution of round pores with little larger pores around the micropyle region.
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