Zebrafish - Hatching Period

Hatching Period

The duration of this period is from 48 to 72hours

• Transitions from Long-Pec to Protruding-mouth

• In this period, primary organ systems develop and cartilage development begins

• Pectorial fins are now elongated with a flat blade but still developing

• Jaws and Gills are also developing along side the pectorial fins

• Olfactory placodes are now developed in the anterior of the eye

• Hair Cells have differentiated

• The mouth is wide open and protrudes anteriorly just beyond the eye

• The first visible bone in the zebrafish, the cleithrum, can be seen between the first two myotomes

• Subintestinal vein is also prominant ventrally to the gut tract formation

Zebrafish: Timeline and Staging of Embryonic Development]