Changing Planet

Fuzzy Nautilus Rediscovered and Filmed After 30 Years

(Photo by Peter Ward)
A detailed shot reveals the fuzzy texturing of Allonautilus scrobiculatus as well as the visible spiral in its shell, and the pinhole eye and thin flexible tentacles emerging from the harder tentacle sheaths shared by other nautiloids as well. (Photo by Peter Ward)

By Peter Ward, National Geographic/Waitt grantee

It’s really nice to see an old friend after a long absence.

Thirty years after the discovery of the fuzzy, slimy, Allonautilus scrobiculatus, I returned to Papua New Guinea to see if this remarkable living fossil had survived the decades of shell hunting and environmental degradation that have driven these living fossils and their closest relatives to the brink of extinction.

We not only found them, we captured the first digital images of them alive in the wild, and attached tracking devices that are revealing some of the oldest and deepest secrets of their survival.

A Name Like No Other

“Nautilus.” The name conjures images of Jules Verne and the United States Navy with its first atomic submarine, and hidden between them, the name-giving animal itself.

Among biologists it is this animal that inspires most, for the simple reason that it appears to be one of the great survivors on Planet Earth: a living fossil.

Funded by the National Geographic Society

Coming from stock that first appeared near the end of the 530-million-year-old Cambrian Explosion, when animal life first appeared in our planet’s global ocean, the nautiloid cephalopods have endured through both good times and bad, including times very, very bad indeed: the great mass extinctions, short intervals of time when most species on Earth died out. Thus survivors such as the nautilus are revered by science.

Unfortunately, it is the very popularity of their beautiful, iconic, spiraled, and internally chambered shells that threatens them most, more than meteors from space, atmosphere-polluting global volcanoes, or even long-enduring ice ages ever did. Surviving mass extinction events is one thing. Surviving the global spread and increasing numbers of humans and our desire for shells and cheap trinkets made from those shells is something else entirely.

Now nautiluses must face another challenge: humans’ desire for metals found most abundantly on the sea beds these ancient survivors call home. And despite all these threats, and the nautiloids’ long history, fascinating discoveries are still being made about them.

Peter Ward researching the popoulartion number and extinction risk of Allonautilus.
A chambered nautilus’s shell reveals its bright red colors when viewed in shallow water from above. (Photo by Peter Ward)

The Other Nautilus

At most sites around the Earth, nautiluses can be found at depths between 300 and a thousand feet. They live singly (never in schools), they grow slowly (taking up to 15 years to reach full size and reproductive age), and they are never overly abundant as they slowly swim over the deep sea beds searching for carrion on the bottom.

In all but one place on Earth, only a single nautilus species can be found at any one site.

Northeast of the main island of Papua New Guinea however, along the coast of Manus Island, made famous by the American anthropologist Margaret Mead in the earlier part of the twentieth century, not only can you find the well-known chambered nautilus (genus: Nautilus, species: pompilius) but south of Manus there is a second species as well. It was first seen alive in 1984, and was found to be so astoundingly different in shell and soft part anatomy that it was, in 1997, give a wholly new genus name: Allonautilus (and species name scrobiculatus). And then, for the next 30 years, it wasn’t seen again.

Gregory Barord releasing two Allonautilus scrobiculatus with ultrasonic transmitters attached to dorsal side of shell. Peter Ward researching the popoulartion number and extinction risk of Allonautilus.
Gregory Barord releases two Allonautilus scrobiculatus with ultrasonic transmitters attached to the dorsal sides of their shells. (Photo by Peter Ward)

Recently, National Geographic and the US National Science Foundation (Polar Programs) sponsored an expedition back to the site where Allonautilus was last seen, and the team succeeded in finding it anew.

The Mission: Snap Pictures, Snip Samples, Leave ‘Em Alive

The goals of this trip were to most broadly ascertain if they still existed at all. I was the organizer of the trip, but could not have gone forward without Greg Barord, whose recent PhD on nautilus biology is changing our understanding of this animal; Rick Hamilton of The Nature Conservancy, who spends much of his life doing conservation science in Melanesia; and Manuai Matuwae, local chief of conservation for the Manus Island area, and the real mover and shaker of our field work.

(Photo by Peter Ward)
Chief Peter of the Mubani Clan, and Chief Protector of Ndrova Island, holds the shell of a Nautilus at left, and Allonautilus at right. (Photo by Peter Ward)

My prior field work in the Philippine Islands, done with Greg on four trips from 2011 to early 2014, has already shown that local populations of Nautilus in the Philippines have been fished to extinction, and the fear was that perhaps the same happened to Allonautilus in PNG in the thirty years since it was last seen alive. But beyond that, if found, the goal was to get the first digital photos, the first live videos, and most importantly, get small snips of flesh, taken in non-lethal fashion, so that the new and powerful DNA techniques of modern genetic science could better understand these animals.

A further goal was, almost ironically, to use bits of shell taken from living nautiloids in a very warm tropical setting, to better understand ancient nautiloids that lived right before and after the great Cretaceous-Paleogene mass extinction in Antarctica, a very cold setting indeed for us field workers when down there now.

Living Fossils and Fossil-Fossils

On four extended field trips sponsored by Polar Programs, I pondered the problem of why the fossil nautiloids so common at our Antarctic field sites survived the catastrophic mass extinction of 65 million years ago ending the Cretaceous, while their near look-alikes, the ammonites (also cephalopods with chambered shells) utterly died out. One group lives, one dies. As the great, and sadly recently deceased paleontologist David Raup famously asked, “Was it good genes? Or simply good luck?”

The question was made partially tractable by our Antarctic field work, and it was the generosity of National Geographic and the Waitt Foundation as well as NSF Polar Programs that allowed this current trip to be possible, the leadership scientists there understanding that the present is indeed the key to the past; that we also needed to study the living descendants as well as the Cretaceous dead, which took us to this study of extant Nautilus and its cousin, Allonautilus, at the sole known place where both can be found.

Swimming with nautiluses in the wild is a great joy. (Photo by Andy Dunstan)
Swimming with nautiluses in the wild is a great joy. (Photo by Andy Dunstan)

Sending Their Secrets Up From the Deep

Additionally, two other techniques not available in 1985 were brought to the field site: deep water video cameras and small acoustic transmitters that could be attached to the shell. If monitored overhead day and night from small boats fitted with appropriate electronic receivers, these transmitters would obtain priceless information on the habits, depths, and even temperatures at which Nautilus and Allonautilus live on the same shared, deep reef environments.

Which led to our day-to-day life. We worked around the clock, with Rick, Manuai, and Greg taking turns with me as we sat in small boats day and night to retrieve the signals of our tagged nautiluses, living their lives far below but informing us of their depths, position, and temperatures of habitation for six days and five nights straight. The heat was a force—oppressive, the afternoons barely breathable; and it is in such times that companions can make the hardship bearable—others living the same hardships and not complaining.

The great joys were the moments we retrieved our traps to find nautiluses, the times we would swim with them, and especially when we pulled our giant, heavy deep-water video systems from the sea and spread out on the lawn on our small island. We’d bring our entire, 40-person clan together and watch the premiere of each 12-hour movie of the night before (played back faster than normal) to watch the nautiluses, deep-water sharks and other fish, and invertebrates of every stripe march into the camera’s field of view in search of the rich fish bait attached to its bright light.

Nautilus pompilius (left) and Allonautilus scrobiculatus (right) floating together, like nowhere else on Earth. (Photo by Peter Ward)

Happily (and in spite of the rigors of working from small boats in equatorial heat and humidity, the latter playing havoc with all electronics, computers, and cameras), all goals were met. None of the nautiluses we saw or briefly collected were “sacrificed for science” (i.e., killed and put in alcohol for eventual existence on a museum shelf).

The data and photos tell us that both of these nautiloid cephalopods exist still. The possible bad news is that their habitat—this part of Papua New Guinea where uniquely in the world two genera of nautiloid cephalopods live—is slated soon for large-scale, deep-water mining that will dredge the sea floor, a seafloor above which these ancient survivors still live.

But for how much longer?

[Updated 8/26/2015]

  • Ana

    So, and now for the important question: what can we do to protect the habitat of these animals?

  • Pedro Penducut

    Poor Nautilus in the Philippines. Sorry to say, a lot of my countrymen will eat anything caught in the wild. A lot are just unenlightened or unaware of the dwindling state and finality of extinction for most endangered species in our realm. Just recently, some idiot shot “Pamana” a recently released, born in captivity, Philippine (Monkey Eating) Eagle, for kicks. They are hunting down the idiot culprit as I comment. We have so little forest cover now, What forests are left are usually sterile, with large mammals, birds and reptiles almost all missing. Maximum sadness.

  • Kandi Dahlan

    I read your research findings in awe. Thank you for sharing this fascinating article. At the same time, I also feel sad that these amazing creatures may not survive human’s greed. After surviving for 500 million years, they may finally face extinction. Very sad, indeed.

  • Tam Warner Minton

    These are awesome, and I cannot believe I have not been diving with them yet!

  • Gregory Barord

    Hi All,

    I was one of the researchers on this trip (Dr. Gregory Barord) and previous trips, and wanted to tell you also what a couple of 12 year olds have done to help nautilus conservation and how to help.

    And also happy answer any questions y’all might have about the trip or nautiluses in general. So glad to get this out there!


  • RW-in-DC

    With a fifteen year reproductive life cycle and solitary habits vs. the annual/biennial one of most plants, these animals seem unlikely candidates for the captive breeding/reintroduction done successfully for others.

  • Gregory Barord

    You can check out to find out how to support nautilus conservation efforts.

  • Courtney

    So amazing and exciting!! Gretchen was bombarded with these articles yesterday; only 4 days at a new school and her teacher found these and printed them out for her yesterday morning.
    I think the biggest thing we can do to help is raise awareness/education!! So many people have never heard of the nautilus (I certainly didn’t know about it until my daughter became interested), and those that have heard about it, many don’t understand how the shell “works.” They think it’s like hermit crabs, they can just switch shells, or that the shells sold have just washed ashore from those nautiluses that have died naturally. EDUCATION, and saturation of the whole, living animal in media (not just the shell) will help. Also, WRITE LETTERS!!! Ebay, Amazon, and Etsy (as well as other online shops) still SELL nautilus shells. Write them a letter requesting they stop.

  • Peter ward

    Mention should be made of the first scientist who figured out where to look, and went out and found them: dr. Bruce Saunders. His assistant at that time was Larry Davis. What now needs to be done is shut down the shell trade and demand that US Fish and Wildlife nominate Nautilus and Allonautilus for treaty trade protection under CITES

  • guillaume

    In New Calédonie we have lot of Nautile in our sea and lagoon

  • Jack Kuhns

    David Quammen profiled the Nautilus for Outside Mag., in oneth of his many columns before moving on to Island Biogeography, “The Song of the Dodo”.

  • Jack Kuhns

    David Quammen profiled the Nautilus for Outside Mag., in one of his many columns before moving on to Island Biogeography, “The Song of the Dodo”.
    This author might’ve mentioned how the chamber mechanism is used to control depth, also the fractal nature of the chamber layout.

  • Judith Kellett

    The shell of the Paper Nautilus, a fine pure white shell, is often to be found on the storm-swept beaches of the islands in Bass Strait. Nobody appears to hunt them there: they live out their lives unhindered, in water much colder than the tropical nautiloids this article describes.

  • Robert Coleman

    Bravo to the young people who are working to get the word out concerning the plight of these beautiful creatures. Hopefully they will grow up to be biologists or oceanographers exploring our last true frontier: the sea.

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