Introduction: Mitosis
Mitosis is the process by which replicated nuclear DNA is equally divided into two daughter nuclei. Mitosis is generally followed by cell division (cytokinesis). Because mitosis is such a fundamental biological process, it has been studied in a wide variety of organisms, each contributing to our overall understanding of this complex event.
Zebrafish development
This film depicts zebrafish (Danio rerio) development from the single-cell stage to hatching.

Elapsed time about 48 hours.
Fertilized zebrafish eggs were mounted in fresh water between a slide and coverslip using a silicon rubber spacer. Images were taken at room temperature on an inverted compound microscope using a 10x DIC objective and digital camera.