existence starts during or after start stage sclerotome somite 10 ZFA:0001036 zebrafish_anatomy Ventromedial region of somite 10 that will form vertebral cartilages and connective tissues. The sclerotome lies ventral to the myotome. Cells of the sclerotome will migrate dorsally to surround the notochord and neural tube. TAO:0001036 sclerotome Segmentation:10-13 somites