part of overlaps start stage end stage frontal bone zebrafish_anatomy Large elongated paired dermal bones that roof the cranium and bear part of the supraorbital canal. The frontal bones cover the upper edge of the lateral ethmoid, orbitosphenoid and pterosphenoids and overlaps the parietal bone posteriorly. ZFA:0000514 TAO:0000514 dermatocranium orbital region neurocranium dermal bone frontal-pterotic joint inter-frontal joint cranial vault frontal-parietal joint larval:days 21-29 adult