Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Gastrula period at the 10 hour bud stage. The animal pole is to the top for the early stages, and anterior is to...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is from the Pharyngula period at the 25 hour Prim-6 stage. The animal pole is to the top for the early stages, and anterio...

Prewave pulse and axial wave. This prewave pulse appears to arise predominantly from the animal pole region, others however appear to emerge nearly simultaneously over large regions of the blastoderm...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Cleavage period at the 1.25 hour 8 cell stage. The animal pole is to the top for the early stages, and anterior...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Blastula period at the 4 hour sphere stage. The animal pole is to the top for the early stages, and anterior is ...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Blastula period at the 4.3 hour dome stage. The animal pole is to the top for the early stages, and anterior is ...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Gastrula period at the 5.3 hour 50% epiboly stage. The animal pole is to the top for the early stages, and anter...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Segmentation period at the 18 hour 18-somite stage. The animal pole is to the top for the early stages, and ante...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is from the Segmentation period at the 19.5 hour 21 somite stage.The animal pole is to the top for the early stages, and a...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is from the hatching period at the 48 hour long-pec stage.The animal pole is to the top for the early stages, and anterior...