"The Chambered Nautilus" is available in collections such as The Poetical Works of Oliver Wendell Holmes, published by Houghton Mifflin in 1975, as well as in reprint editions of The Autocrat of the Breakfast-Table, such as that published by J. M. Dent & Sons in 1960. The spiral shell of chambered nautiluses is thin and smooth with a brown and white pattern. It then migrates upward to about 300 feet to seek prey during evening hours. Itâs one of hundreds laid by adults in our âTentaclesâ exhibit. Among living cephalopods, only nautilus has an external chambered shell. Author Biography. Common Names: Nautilus, chambered nautilus Phylum: Mollusca Class: Cephalopoda Order: Nautilida Family: Janiroidea Range: Tropical Western Pacific Ocean Natural Environment: During daylight hours, the nautilus spends its time at or near the bottom areas of deep (e.g., 1500-foot) reef slopes. Identification. The Chambered Nautilus Is the Oceanâs Most Efficient Jet Engine. Aquarist Ellen Umeda is living a childhood dream: working at the Aquarium and raising chambered nautilus hatchlings. The chambered nautilus (Nautilus pompilius) is hands-down the most famous of these cephalopods. They have up to 30 chambers created in their shells as the animals increase in size and move to occupy the outermost chamber. The chambered nautilus lives in deep waters of the open ocean and is one of very few species of shelled invertebrates that live in the water column instead of in contact with the seafloor or reef surface. The chambered nautilus propels itself by sucking in and shooting out water, and uses far â¦ A chambered nautilus hatchling begins to emerge from its egg in a behind-the-scenes nursery. The animal only lives in the outermost chamber of the shell. Nautilus are extremely different in many ways from all other living cephalopods in the sub-class Coleoidea. Chambered or emperor nautiluses, Nautilus pompilius (Linnaeus, 1758), reach about 20 cm in length. Studying these âliving fossilsâ however is useful in understanding the behaviour and evolution of ancestral cephalopods.