This PDF file includes:

• fig. S1. Identification of rare double-color and GFP⁺ clones in neural crest ectomesenchyme in E9.5 to E10.5 embryonic faces.
• fig. S2. Clonal mixing and distribution of NCC-derived clones in the embryonic trunk and head through the development.
• fig. S3. Defined borders between mesoderm- and neural crest–derived progenies at postnatal and embryonic stages.
• fig. S4. Genetic tracing of mesoderm-derived mesenchymal progenies reveals similarities with the neural crest–derived ectomesenchyme.
• fig. S5. Live imaging of ectomesenchymal clones and progenitors in the eye shows difference between organized crowd movements and individual migrations.
• Legends for movies S1 to S5
• Supplementary Materials and Methods

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Other Supplementary Material for this manuscript includes the following:

• movie S1 (.avi format). Live imaging of genetically traced neural crest–derived progenies in Sox10-CreERT2/Ubi:zebrabow-S zebrafish larvae between 30 and 56 hpf, ventral view.
• movie S2 (.avi format). Live imaging of translocating ectomesenchymal clusters in Sox10-CreERT2/Ubi:zebrabow-S zebrafish larvae between 39 and 52 hpf, ventral view.
• movie S3 (.avi format). Live imaging of genetically traced neural crest–derived progenies in Sox10-CreERT2/Ubi:zebrabow-S zebrafish larvae between 30 and 88hpf, ventral view.
• movie S4 (.avi format). Live imaging of translocating ectomesenchymal clusters in Sox10-CreERT2/Ubi:zebrabow-S zebrafish larvae between 39 and 52 hpf, ventral view.
• movie S5 (.avi format). 3D EdU analysis of Col2a1aBAC:mCherry zebrafish larva?s entire head at 4 dpf corresponding to Fig. 5 (O to Q).