Look, but don’t touch! These delicate-looking jelly relatives are siphonophores, related to the notorious Portuguese man-of-war. Each comprises a floating colony, with specialized individuals to sting, eat, or just swim. 

Get a closer look at these unusual drifters and more in the Open Sea

The Coolest Animals You’ve Never Seen: How a “Dream Team” of Scientists from the Aquarium and MBARI is Displaying Deep-Sea Cephalopods

From the vampire squid to the flapjack octopus, deep-sea cephalopods come in an amazing variety of shapes and sizes. Yet few humans have seen them alive.

Until now.

In the last month, we’ve displayed them as part of our “Tentacles” exhibit—thanks to a  collaboration with our partner institution, the Monterey Bay Aquarium Research Institute (MBARI). “MBARI has some of the best deep-sea biologists in the world,” says Aquarist Bret Grasse. “And they’ve been working with these animals for years. They’re great at finding and collecting deep-sea animals, and we’re good at keeping them alive and sharing them with the public.”

A mission like no other

The first challenge is to find the animals. Enter Stephanie Bush, postdoctoral fellow and expert on deep-sea cephalopods. She combed through MBARI’s database of ROV (remotely operated vehicle) dives, looking for locations in Monterey Canyon where deep-sea octopuses and squid were likely to be found.

“Many of these creatures are not rare in the deep sea,” she says. “They’re just rarely collected.”

The next challenge was keeping the animals alive after they reached the surface. The deep sea is almost pitch black, with crushing pressure, near-freezing water, little oxygen, and sparse food.

“We do the best we can to replicate an animal’s natural environment,” says Bret. “In this case, we used data on oxygen concentrations, water temperature, and salinity collected by MBARI’s ROVs to help us figure out what conditions the animals need.”

When it came to deciding what to feed the animals, the team looked at studies of the gut contents of dissected animals. In the case of the vampire squid, MBARI researchers recently discovered that they use a sticky filament to collect “marine snow.” To replicate this, our aquarists filled a blender with chilled seawater, fish eggs, krill, and bits of moon jelly, creating a slurry that they offered to the vampire squid in squirts from a turkey baster.

Showing an animal that’s never been shown before

But keeping the animals alive was only half the battle—our aquarists also had to figure out how to display them.  Inevitably, the animals are exposed to light (even though the exhibit is in a dimmed room) and occasional camera flashes (even though there are signs prohibiting this), as well as noise and vibrations from people.

In some cases, this means that deep-sea cephalopods only remain on exhibit for a few days at a time, before being returned to a nice dark, quiet tank in a back room. As Bret put it, “We’re always balancing the public’s desire to see these animals with what we think is best for the animals.”

The collaboration has allowed MBARI researchers to make new discoveries.

“When you have an animal in a tank, you can see little details in the shapes and behavior that you might not notice in video,” Stephanie says. “For example, of the fourteen flapjack octopuses we collected, every single one was a mature female. We have no idea why this is, or where the males are.”

Stephanie is especially excited because one of these female octopuses laid eggs behind the scenes.

“Before this, no one even knew what the eggs of this octopus looked like,” she said. “Now we know that they lay tiny little eggs on rocks, and then cover them with sand.” Stephanie is hoping that the eggs hatch, but no one knows how long this might take.

Overall, it’s been an amazing collaboration—with an important benefit.

“I think it’s great that we’re inspiring a ton of people to care about the deep sea,” says Bret. “It’s an area that we rarely see, but which is the largest habitat on Earth.”

Learn more about MBARI

Learn more about our Tentacles exhibit

How did you honor our oceans for #WorldOceansDay this past weekend? Thanks to Bill at Santa Cruz Sand for this great tribute!Learn more about our conservation efforts

How did you honor our oceans for #WorldOceansDay this past weekend? Thanks to Bill at Santa Cruz Sand for this great tribute!

Learn more about our conservation efforts


Happy #WorldOceansDay! How will you celebrate the amazing resource that covers 70 percent of our planet? (Charles Seaborn) 

Happy #WorldOceansDay! How will you celebrate the amazing resource that covers 70 percent of our planet? (Charles Seaborn) 

Fishermen aren’t the only ones enjoying the bounty of squid off our decks right now. Risso’s dolphins have also been enjoying the feast! These animals are easily identified by their white scarring, left by encounters with other dolphins—and by hooks on squid tentacles. Learn more about life in the bay (Photo: Giancarlo Thomae/Sanctuary Cruises)

Fishermen aren’t the only ones enjoying the bounty of squid off our decks right now. Risso’s dolphins have also been enjoying the feast! These animals are easily identified by their white scarring, left by encounters with other dolphins—and by hooks on squid tentacles.

Learn more about life in the bay

(Photo: Giancarlo Thomae/Sanctuary Cruises)

How many hues have you seen? This #FanFriday photo by Charlene Boarts gives you a great idea of the bigfin reef squid’s color wheel! Learn more

How many hues have you seen? This #FanFriday photo by Charlene Boarts gives you a great idea of the bigfin reef squid’s color wheel!

Learn more

What does it take to build a 3,700-square-foot exhibit featuring two-dozen species of octopuses, cuttlefish and squid? Just add water, right? Get the insider’s view of how we built Tentacles.

Learn more about the exhibit

Make a special connection with the ocean! Join us June 14 for a 30th Anniversary Celebration as we honor musician and ocean advocate Jack Johnson with the Paul Walker Ocean Leadership Award. Proceeds support our Children’s Education Fund to inspire future generations of ocean conservation leaders. Learn more and buy tickets

Make a special connection with the ocean! Join us June 14 for a 30th Anniversary Celebration as we honor musician and ocean advocate Jack Johnson with the Paul Walker Ocean Leadership Award. Proceeds support our Children’s Education Fund to inspire future generations of ocean conservation leaders.

Learn more and buy tickets

It’s #ThrowbackThursday! This Fall 1980 edition of our newsletter featured elegant algae of Monterey Bay, drawn by seaweed scientist, Aquarium founder and Executive Director Julie Packard. Learn more about giant kelp—the inspiration for our logo!

It’s #ThrowbackThursday! This Fall 1980 edition of our newsletter featured elegant algae of Monterey Bay, drawn by seaweed scientist, Aquarium founder and Executive Director Julie Packard.

Learn more about giant kelp—the inspiration for our logo!

Just a shell, you say? Get ready for the nautilus as you’ve never seen it before in this great video!  

Learn more about the chambered nautilus


About me

The Monterey Bay Aquarium, perched on the edge of a world-famous coastline, is your window to the wonders of the ocean. It’s located on historic Cannery Row in Monterey and is open daily except Christmas Day.

For more information about our animals and exhibits, and to view our live web cams, please visit www.montereybayaquarium.org.

Hours of operation vary by season. Daily schedules and tickets are available on our website or by calling
(831) 648-4800.