Number of inter- and intraspecific aggressive interactions observed per fish (± 1 SE) during control and interaction experiments.

Data in the left portion of the figure are from interaction trials between lionfish and a given snapper species, and data in the right portion of the figure are from lionfish and snapper monoculture control trials of three and four individuals of a given snapper species (gray, lane, or red snapper), and one or four individuals for lionfish (lion).