embryo true zebrafish_anatomy ZFA:0000103 cleavage:2-cell cleavage:4-cell cleavage:8-cell cleavage:16-cell cleavage:32-cell cleavage:64-cell blastula:128-cell blastula:256-cell blastula:512-cell blastula:1k-cell blastula:high blastula:oblong blastula:sphere blastula:dome blastula:30%-epiboly gastrula:50%-epiboly gastrula:germ-ring gastrula:shield gastrula:75%-epiboly gastrula:90%-epiboly gastrula:bud segmentation:1-4 somites segmentation:5-9 somites segmentation:10-13 somites segmentation:14-19 somites segmentation:20-25 somites segmentation:26+ somites pharyngula:prim-5 pharyngula:prim-15 pharyngula:prim-25 pharyngula:high-pec