Camera lucida sketches of the zebrafish embryo at selected stages. This image is from the Pharyngula period at the 31 hour Prim-16 stage. The animal pole is to the top for the early stages, and anteri...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is from the hatching period at the 60 hour pec-fin stage. The animal pole is to the top for the early stages, and anterio...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is from the hatching period at the 72 hour protruding mouth stage. The animal pole is to the top for the early stages, an...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Zygote period at the 0.2 hour 1 cell 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 Cleavage period at the 2 hour 64 cell stage. The animal pole is to the top for the early stages, and anterior i...

Camera lucida sketches of the zebrafish embryo at selected stages. The animal pole is to the top for the early stages, and anterior is to the top later, except for the two animal polar (AP) views show...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Blastula period at the 3.75 hour oblong 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 Gastrula period at the 5.7 hour germ ring stage. The animal pole is to the top for the early stages, and anterio...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Segmentation period at the 11 hour 3 somite 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 16 hour 14 somite stage. The animal pole is to the top for the early stages, and ante...