Which invertebrates that exchange gases through gills?

Invertebrates that exchange gases through gills include various species of marine and freshwater organisms, such as mollusks (like clams and octopuses), crustaceans (like crabs and shrimp), and certain annelids (like segmented worms). These gills are specialized structures that facilitate the uptake of oxygen from water and the expulsion of carbon dioxide. Gills can be external or internal, depending on the species and its habitat. This adaptation allows these invertebrates to efficiently respire in aquatic environments.