Cameroceras is a species of invertebrate confirmed to appear in Additional Creatures: Aquaria.
Cameroceras, meaning "Chambered Horn" is a species of nautiloid that lived in North America, Europe, and Asia during the Ordovician period, 450 million years ago. At 6m long, Cameroceras is the largest nautiloud to have lived. The shell of Cameroceras is believed to have made it extremely limited in terms of mobility, but chambered in the shell, filled with air, would allow it to maintain buoyancy.
There is not much known about how the Cameroceras will be in Additional Creatures. Only its design is known as of now.