👉 Bathyacmaea/Serradonta are two species of crustaceans that belong to the family Crustacea, a group of animals commonly known as crabs. They are characterized by their elongated bodies and soft, hard shelled shells, which they use for protection from predators. Bathyacmaea is a terrestrial crustacean found in saltwater habitats like oceans or rivers, while Serradonta is an aquatic species that lives in freshwater environments like lakes and rivers.