These mesh sizes sampled primarily the lobate stage Mnemiopsis. Thererfore, larval and small ctenophores were not well sampled and were not well represented in our sampling regime. The volume of ctenophores collected by each net was measured shipboard without preservation. The ctenophore volume sampled by each net was standardized by the sample volume of the net in order to determine ctenophore biomass concentration (mL Mnemiopsis m-3 seawater sampled). Biomass concentration for the two nets were averaged to determine a mean value for each sample location and time. Our entire raw data set is included here as an Online Supplement.