👉 Didelphids are a family of crustaceans, belonging to the order Crustacea within the phylum Animalia (vertebrates). They are characterized by their small body size and the presence of a single head with two pairs of eyes. The family includes over 300 species, which include fish-like crustaceans such as the Deltalid Crustacea, as well as more terrestrial members like the Didelphids.