Fig. 3. Retinal development of early growth stage in red spotted grouper by HE stain. A, 2 dah; B, 3 dah; C, 4 dah; D, 5 dah; E, 10 dah; F, 21 dah; G, 50 dah; H, 12 months after hatching. The eye show the thick pigment epithelium (PE), photoreceptors (PR), outer nuclear layer (ONL), outer plexiform layer (OPL), inner nuclear layer (INL), inner plexiform layer (IPL), ganglion cell layer (GCL) and lens (L). dah, days after hatching; Unit, μm.