Lateral line sensory organs becoming incorporated into the scale in zebrafish (Wada & Kawakami). Top left: Summary of gene expression domains at early anterior rhombic lip and roof plate (Tong et al .). Top middle: En2‐misexpressing cells fail to migrate to the superficial layers of the optic tectum (Omi & Nakamura). Top right: Neural crest cells (green) forming the sympathetic ganglia and adrenal glands have arrived at their respective destinations dorsal and ventral to the dorsal aorta (red) (Lumb & Schwarz). Second from the top: Endochondral ossification in long bone (Tsang et al .). Bottom left: Model of Pou3f1 gene function in the neural fate commitment (Tang et al .). Bottom middle: Hoxb5 is expressed in different types of enteric neurons including nNOS neurons (Kam & Lui). Bottom right: Ci degradation mechanism regulated by Hh signaling pathway to ensure the proper development (Xion et al .). The figure was arranged by Dr. W. C. W. Chan, Hong Kong University.