Formation and ossification of anal fins in larval crimson snapper. A, Larvae on 13 DPH show developing anal fins (AF); B, Larvae on 14 DPH show developing pterygiophores (PT) and hard spine (HS); C, Larvae on 16 DPH show cartilaginous of pterygiophores, three hard spine and fin rays; D, Larvae at 22 DPH show 2nd to 11th pterygiophores; E, Larvae on 24 DPH show ossification of pterygiophores, hard spine and fin rays; F, Larvae on 34 DPH show ossification of anal fins.