Histology (a) and colocalization maps of representative lipids and metabolites in adult male zebrafish: (b) skin/testes (blue), brain/eye/spinal cord (green), intestines (red), (c) liver/kidney/skin (blue), spinal cord (green), kidney (red), and (d) skeletal muscle (blue), brain/eye/spinal cord (green), gills/spleen (red). Phosphatidylcholines and ceramides are abbreviated PC and Cer, respectively.