This occurs in amphipod and isopod Crustacea and Lepidoptera. Barbara's buttons, an unnamed amphipod, and an unnamed isopod. Stygobromus lucifugus is an extinct species of amphipod crustacean in the family Crangonyctidae. Hyalella azteca is a widespread and abundant species of amphipod crustacean in North America. Corophium volutator is a species of amphipod crustacean in the family Corophiidae. The most diverse groups are the prosobranch gastropods and amphipod crustaceans. A favourite food is the small crustacean "Gammarus", an amphipod shrimp. Another species that makes use of the burrow is the amphipod crustacean, "Urothoe marina". Invertebrate species include Stygofauna, amphipod crustaceans, of "Nedsia"<nowiki>,</nowiki> "Liagoceradocus" and other genera. Hyperia macrocephala is a species of zooplankton, an amphipod in the family Hyperiidae. Other organisms eaten include the amphipod "Halice hesmonectes" and the gastropod "Cyathermia naticoides". Gammarus lacustris is an aquatic amphipod. Several species of amphipod live symbiotically inside the zooids. It was the only species of cyamid amphipod to be reported inhabiting a sirenian. Corophium is a genus of the amphipod family Corophiidae.