👉 Chelidonisids are a group of small, rodent-like animals that belong to the family Cephalopoda. They have a flattened body shape, with a short snout and a large mouth opening at the base of their head. Members of this group include chelidons, which are commonly found in freshwater environments, as well as other types of cephalopods like the octopus. Chelidonisids typically feed on small prey such as crustaceans,