Querbandhechtling. Letzte Phasen der Epibolie, Konzentration der amöboiden Zellen zur Keimanlage, Keimstreifausbildung mit Chorda, Somiten und Neuralmaterial. Entwicklung des Auges von der Blase zum ausdifferenzierten Organ, Gehirndifferenzierung, statoakustisches Organ. Auftreten und Wanderung der Pigmentzellen. Mit Zeitraffung.

The film demonstrates the early development and the organ differentiation period of a bony fish. Particularly emphazised are the following processes: 1. Formation of the germ disposition by aggregation of amoeboid cells. 2. Development of the eye from the early eye vesicle to the differentiated organ. 3. Developmental processes in the brain and the statoacustic organ. 4. Formation, migration and differentiation of several pigment cells.