Chambered Nautilus Receives Much-needed International Protection . Ancient Mollusk, in Demand for Beautiful Shells, Threatened by Trade. JOHANNESBURG, South Africa— Nations around the world today ...

However, the Fisheries Service chose not to close or limit the U.S. nautilus import market. “Endangered Species Act protection will help, but it’s disappointing that the Trump administration delayed ...

Fossils from the famed Burgess Shale continue to deliver fresh perspectives on a dramatic episode in evolutionary time. The latest revelations bear on the early history of cephalopod molluscs. The ...

Wikimedia Commons // Public Domain. Nautilus shells have a series of chambers connected by the siphuncle—a tube made of tissue. A newborn nautilus starts life with four chambers, adding more and ...

Like its fellow marine dweller the horseshoe crab, the chambered nautilus hasn't changed much in 400 million years. The pair are actually considered living fossils.