Ultrastructure of the Chorion and its Micropyle Apparatus in the Mature Discus (Symphysodon spp.) Eggs

Abstract

Abstract The surface ultrastructure of discus (Symphysodon spp.) eggs was investigated by a scanning electron microscopy technique. The telolecital, oval and pale yellow colored mature discus eggs were possessed a micropyle and consisted of relatively smooth-sided, funnel-shaped vestibule at the bottom. The outer surface of the eggs were covered with pile of short fibrils.