Nautilus - Wikipedia
网页Nautili are the sole living cephalopods whose bony body structure is externalized as a planispiral shell. The animal can withdraw completely into its shell and close the opening with a leathery hood formed from two specially folded tentacles.
Nautiloid - Wikipedia
网页Nautili are free swimming animals that possess a head with two simple lens-free eyes and arms (or tentacles). They have a smooth shell over a large body chamber, which is divided into subchambers filled with an inert gas (similar to the composition of atmospheric air, but with more nitrogen and less oxygen ) making the animal neutrally buoyant ...
Nautilus - American Oceans
网页Nautilus is a living fossil that has remained relatively unchanged for over 500 million years. It is a deep-sea creature that feeds on small fish and crustaceans. Nautilus has a unique anatomy that includes a spiral-shaped shell, two large eyes, and a pair of tentacles.
Nautilus Definition & Meaning - Merriam-Webster
网页The meaning of NAUTILUS is any of a genus (Nautilus) of cephalopod mollusks of the South Pacific and Indian oceans with a spiral chambered shell that is pearly on the inside —called also chambered nautilus.
Nautilus | Mollusk, Shell, Subclass | Britannica
网页2024年9月28日 · nautilus, either of two genera of cephalopod mollusks: the pearly, or chambered, nautilus (Nautilus), to which the name properly applies; and the paper nautilus (Argonauta), a cosmopolitan genus related to the octopus.
Order Nautilida: The Ancient and Enigmatic Nautilus | Earth Life
网页2021年6月22日 · The Nautiluses, or Nautili are a small, and very beautiful, group of living, shelled cephalopods. The word “Nautilus” shares a root with ‘nautical’ and means ‘Sailor’. It is derived from the ancient Greek ναυτίλος. Nautilus is the singular, the plural is either nautiluses or nautili.
Nautilus - Description, Habitat, Image, Diet, and Interesting Facts
网页The young nautiluses are a little over an inch long, and fully independent at hatching. Everything you should know about the Nautilus. The Nautilus is an odd-looking sea creature, like a swimming seashell stuffed with an octopus-like creature.
What is a nautilus? - NOAA's National Ocean Service
网页2024年6月16日 · The nautilus is a mollusk that uses jet propulsion to roam the ocean deep. Writers, artists, and engineers have long marveled at the nautilus’s beauty and swimming abilities. The chambered or pearly nautilus is a cephalopod (a type of mollusk)—a distant cousin to squids, octopi, and cuttlefish.
4 Things to Know About the Nautilus - Ocean Conservancy
网页2019年8月26日 · Read on to learn four things to know about the nautilus. They have well-known relatives. Nautiluses are members of the phylum Mollusca, which includes clams, scallops, oysters and more. Within the phylum, they are members of class Cephalopoda, which also includes squid, cuttlefish and octopuses.
Nautilus - A-Z Animals
网页2024年5月27日 · A close relative of the octopus, squid, and cuttlefish, the nautilus is a living fossil whose ancestors evolved nearly 500 million years ago. These deep-dwelling scavengers navigate using jet propulsion and a complicated system of chambers that adjust their buoyancy in the water.