Images of the Developing Zebrafish Embryo (IMAGE) Institute of Science and Technology Austria Caption As the zebrafish egg cell starts to divide, cytoplasm and yolk granules are segregated. Top row: Bright-field images of the developing zebrafish embryo injected with green micron-sized polystyrene beads. Clear upper area: cytoplasm/animal pole; more hazy lower area: yolk granules/vegetal pole. Bottom row: Fluorescence images of a zebrafish embryo labelling both cytoplasm (bright areas) and yolk granules (dark areas). Credit IST Austria/Heisenberg group Usage Restrictions with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.