Files in this Data Supplement:

• Supplemental Figure S1 (Adobe PDF) -

  Fig. S1. Example of center of volume (COV) and center of area (COA) calculation for zebrafish at age 5 days. Volume assumes an elliptical cross-section of the fish. COV will coincide with the COM is a uniform density is assumed.

• Supplemental Figure S2 (Adobe PDF) -

  Fig. S2. Example of center of volume (COV) and center of area (COA) calculation for zebrafish at age 15 days. Volume assumes an elliptical cross-section of the fish. COV will coincide with the COM is a uniform density is assumed.

• Supplemental Figure S3 (Adobe PDF) -

  Fig. S3. Example of center of volume (COV) and center of area (COA) calculation for zebrafish at age 28 days. Volume assumes an elliptical cross-section of the fish. COV will coincide with the COM is a uniform density is assumed.

• Supplemental Figure S4 (Adobe PDF) -

  Fig. S4. Location of center of volume (COV) and center of area (COA) measured posterior from the snout of the fish. For ages 5, 15 and 28 days, we measured data from 3, 5 and 4 fish, respectively. Horizontal bars indicate the mean value. As the fish get older, the COV and COA become closer to the same location.

• Movie 1 -

  Movie 1. 15 d.p.f. wild-type zebrafish. Tracking results for 15 d.p.f. wild-type zebrafish. Note that accurate tracking is achieved despite the partial occlusion by the horse hair.