OAKLAND, Calif.— The National Marine Fisheries Service today announced it will consider giving Endangered Species Act protection to the chambered nautilus, an ocean mollusk threatened with extinction ...

The chambered, or pearly, nautilus (Nautilus pompilius) is a charismatic cephalopod species known for its exceptional spiraling, chambered shell. It belongs to a family that has barely changed since ...

Jack Wonfor (pictured) is among the fossil hunters on the Isle of Wight who found a 211-pound fossilized seashell. It’s a 115-million-year-old ammonite, best described as a “squid-like cephalopod ...

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. The nautilus dominated the ancient ...

In 1984, University of Washington biologist Peter Ward and a colleague discovered a new type of nautilus in the deep ocean off Papua New Guinea. Then the creature seemed to vanish. For nearly 30 years ...

Ammonoids, ancestors of today's octopus, squid and cuttlefish, bobbed and jetted their way through the oceans for around 340 million years beginning long before the age of the dinosaurs. If you look ...

A rare species of nautilus, not seen in three decades, was spotted recently off of Papua New Guinea. University of Washington biologist Peter Ward last saw the elusive variation, which has a thick, ...

The origins of vivid colors within the gemstone ammolite—a rare type of brightly colored fossilized ammonite shell—are ...

In early August, a biologist returned from the South Pacific with news that he encountered an old friend, one he hadn't seen in over three decades. The professor had seen what he considers one of the ...

The organic matrix components of a fossil ammonoid shell from the Upper Cretaceous, can be separated into sub-fractions which are generally comparable to those found in extant Nautilus, using ion ...