Formation and ossification of the skull in larval crimson snapper. A, Larvae on 3 DPH show developing mandible (Ma) and ceratobranchial (Cb); B, Larvae on 8 DPH show developing maxillary (Mx), cleithrum (Cl), operculum (Op), parietal (Pa), infraorbital (Io) and cartilaginous mandible and ceratobranchial; C, Larvae on 14 DPH show developing premaxillary (Pr), posttemporal (Po), supracleithrum (Sc), hyoid (Hy), opercular spine (OS) and cartilaginous maxillary, parietal, infraobital, cleithrum; D, Larvae on 18 DPH show cartilaginous basibranchial and ossification of mandible, operculum, cleithrum; E, Larvae on 25 DPH show ossification of dentary, maxillary, parietal; F, Larvae on 31 DPH show ossification of neurocranium.