Resource availability

Lead contact

Further information and requests for resources should be directed to the lead contact: lena.van.giesen@ntnu.no.

Materials availability

This study did not generate new materials.

Data and code availability

•Data: Data for Nematostella vectensis (48–120 hpf) body size and coordinate information (related to Figure 3) can be found at Figshare and are publicly available as of the date of publication at https://doi.org/10.6084/m9.figshare.32820290. All other data reported in this paper will be shared by the lead contact upon request.•Code: Original code can be found at Figshare and is publicly available as of the date of publication https://doi.org/10.6084/m9.figshare.32817278.•Other: Accession numbers from previously described genes analyzed in Figure 4, are listed in the key resources table. Any additional information required to reanalyze the data reported in this paper are available from the lead contact upon request.