Fig. 7. A set of images taken of developing fry⁷ laterals over time. As the developmental rate of fry⁷ animals is delayed and variable, we note the first panel as 0 hours and report the number of hours since that time. Two time series are shown – one on the right and the other on the left. The arrows point to the most distal point on the lateral of interest, the arrowhead to the relevant branch-point. In the panels on the right, note the dramatic movement of the branch-point as the lateral grew. In the panels on the left, note the deformation of the lateral at 9.75 hours and its subsequent split by 16.75 hours.