Yellow labels, endochondral bones (cb5, ceratobranchial 5; ch, ceratohyal); white labels, dermal bones (bsr, branchiostegal ray; cl, cleithrum; d, dentary; en, entopterygoid; op, operculum; ps, parasphenoid). b, Ventral view of a 5-dpf wild-type (WT) embryo stained with alizarin ...