Impacts of Invasive Ctenophores on the Fisheries of the Black Sea and Caspian Sea

Figure 1a.Th e ctenophore Mnemiopsis leidyi of the Black Sea.Photo by Ahmet E. Kideys.Figure 1b.Th e ctenophore Beroe ovata of the Black Sea.Th is specimen has no food (i.e., Mnemiopsis leidyi) in its stomach, which is most of the body cavity (compare with Figure 1c and 1d where the organisms have food in their stomachs).Mouth of B. ovata, which is half closed, is along the entire width.