Correction: Histamine is a modulator of metamorphic competence in Strongylocentrotus purpuratus (Echinodermata: Echinoidea)

In Figure six (Figure 1 here) of the original manuscript [1] panels B-H are representative images from which measurements were taken and then graphed in Figure six panel I. In the original submission of the manuscript panel C and H ended up showing identical images. We corrected this error by replacing panel C with the correct representative image. Note that this error occurred when preparing the original figure and it does not affect the data presented in any way.