Common prey include bristlemouths, lanternfish, and barbeled dragonfish. The red-legged kittiwake feeds on fish such as lanternfish (Myctophidae), squid and invertebrates. King penguins mainly eat lanternfish, squid and krill. It is the most species rich lanternfish genus. Their diet includes shrimp, plankton, and smaller fish such as lanternfish. Researchers were also looking at the impact of plastic on mesopelagic fish, such as lanternfish. Ray's dissertation was "The peripheral nervous system of Lampanyctus leucopsarus", a lanternfish. The lanternfish is, by far, the most common deep-sea fish. Antarctic silverfish and lanternfish are some examples of fish that live in Antarctica.