Our new paper was just published in ICES Journal of Marine Science. We showed that a particular scyphomedusa species, Pelagia noctiluca (also known as “the mauve stinger”), was abundant in the northern Gulf of Mexico during two summer seasons (2011 and 2016). This species is normally associated with the Mediterranean Sea, where it can form intense blooms that sting swimmers. In the Gulf of Mexico, however, it lurks below fresher surface waters, so swimmers will not encounter them unless you habitually dive below 10 m. In addition to showing some of the first high-resolution distributions of these organisms, we demonstrated that several other zooplankton groups are less abundant in the vicinity of these medusae, which suggests they have a fine-scale, top-down impact on their prey. Larval and juvenile fishes also tended to aggregate underneath the bells of the Pelagia medusae, but only during the daytime.