Cephalopod Videos

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,562
Reaction score
1,771
Location
Gainesville, GA
Published on Feb 14, 2017
Those hundreds of powerful suckers on octopus arms do more than just stick. They actually smell and taste. This contributes to a massive amount of information for the octopus’s brain to process, so the octopus depends on its eight arms for help.

To keep up with Amy Standen, subscribe to her podcast The Leap - a podcast about people making dramatic, risky changes:

https://ww2.kqed.org/news/programs/th...
DEEP LOOK is a ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. Explore big scientific mysteries by going incredibly small.

SUBSCRIBE to Deep Look! Deep Look

* NEW VIDEOS EVERY OTHER TUESDAY! *

Everyone knows that an octopus has eight arms. And similar to our arms it uses them to grab things and move around. But that’s where the similarities end. Hundreds of suckers on each octopus arm give them abilities people can only dream about.

“The suckers are hands that also smell and taste,” said Rich Ross, senior biologist and octopus aquarist at the California Academy of Sciences.

Suckers are “very similar to our taste buds, from what little we know about them,” said University of North Carolina, Chapel Hill, cephalopod biologist William Kier.

If these tasting, smelling suckers make you think of a human hand with a tongue and a nose stuck to it, that’s a good start to understanding just how differently octopuses are organized than humans. It all stems from the unique challenges an octopus faces as a result of having a flexible, soft body.

“This animal has no protection and is a wonderful meal because it’s all muscle,” said Kier.

So the octopus has adapted over time. It has about 500 million neurons (dogs have around 600 million), the cells that allow it to process and communicate information. And these neurons are distributed to make the most of its eight arms. An octopus’ central brain – located between its eyes – doesn’t control its every move. Instead, two thirds of the animal’s neurons are in its arms.
“It’s more efficient to put the nervous cells in the arm,” said neurobiologist Binyamin Hochner, of Hebrew University, in Jerusalem. “The arm is a brain of its own.”

This enables octopus arms to operate somewhat independently from the animal’s central brain. The central brain tells the arms in what direction and how fast to move, but the instructions on how to reach are embedded in each arm.

Octopuses have also evolved mechanisms that allow their muscles to move without the use of a skeleton. This same muscle arrangement enables elephant trunks and mammals’ tongues to unfurl.

“The arrangement of the muscle in your tongue is similar to the arrangement in the octopus arm,” said Kier.

In an octopus arm, muscles are arranged in different directions. When one octopus muscle contracts, it’s able to stretch out again because other muscles oriented in a different direction offer resistance – just as the bones in vertebrate bodies do. This skeleton of muscle, called a muscular hydrostat, is how an octopus gets its suckers to attach to different surfaces.

--- How many suction cups does an octopus have on each arm?

It depends on the species. Giant Pacific octopuses have up to 240 suckers on each arm.

--- Do octopuses have arms or tentacles?

Octopuses have arms, not tentacles. “The term ‘tentacle’ is used for lots of fleshy protuberances in invertebrates,” said Kier. “It just happens that the eight in octopuses are called arms.”

--- Can octopuses regrow a severed arm?

Yes!

---+ Read the entire article on KQED Science:

https://ww2.kqed.org/science/2017/02/...

---+ For more information:

The octopus research group at the Hebrew University of Jerusalem: https://www.youtube.com/watch?v=gN81d...

---+ More Great Deep Look episodes:

You're Not Hallucinating. That's Just Squid Skin.
https://www.youtube.com/watch?v=0wtLr...

Watch These Frustrated Squirrels Go Nuts!
https://www.youtube.com/watch?v=ZUjQt...

---+ See some great videos and documentaries from the PBS Digital Studios!

It’s Okay To Be Smart: Is This A NEW SPECIES?!
https://www.youtube.com/watch?v=asZ8M...

BrainCraft: Your Brain in Numbers
https://www.youtube.com/watch?v=FFcbn...

---+ Follow KQED Science:

KQED Science: KQED Science
Tumblr: http://kqedscience.tumblr.com
Twitter: KQEDscience (@KQEDscience) | Twitter

---+ About KQED

KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media.

Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.

 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,562
Reaction score
1,771
Location
Gainesville, GA
Squid - Mesonychoteuthis hamiltoni (Colossal Squid) Dissection staring Tintenfisch, Heather Braid and GPO87 (2014)

 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,562
Reaction score
1,771
Location
Gainesville, GA
Octopus - Argonauta (Paper Nautilus)

Rare argonaut octopus washes ashore

You just never know what you'll discover walking along the beach at night. For Tiphareth Aquarian, a stroll along Lanikai Beach in Hawaii on the evening of May 10 presented an encounter with an unusual creature. As many of us might do, she quickly took out her phone and captured a video.

"I saw this on Lanikai beach Wednesday night on the full moon," she wrote on Facebook. "I believe it's an Argonaut or Paper Nautilus? Has anyone seen one of these before? It had beached its self but I got it back in the water before it died."
...
 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,562
Reaction score
1,771
Location
Gainesville, GA
Dying giant squid found and brought to shore. Perhaps the most interesting thing is the ejeculation of spemataphores as it is dying.
Published on Jun 22, 2017
To use this video in a commercial player or in broadcasts, please email licensing@storyful.com

Here are some good articles for those who are interested:

General info - Architeuthis dux

what the white things are that come out when it is on the beach - http://tolweb.org/accessory/Cephalopo...

and how they reproduce - https://www.tonmo.com/pages/architeut...
 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,562
Reaction score
1,771
Location
Gainesville, GA
Friendly giant Pacific octopus

Published on Sep 20, 2013
This octopus was out hunting and had just recently caught a crab. After exploring the camera's lights, it swam off a short distance. I had always wanted to feel an octopus' suckers, so I removed my glove and let the tentacles latch onto my hand. At first the sensation was much stronger than I had anticipated. The octopus seemed to show curiosity at this point and kept trying to place more arms onto me. As you can see, it seems much more interested in my bare hand than any of my dive gear. Because these octopus have a ripping, crushing beak like a parrot, I decided it was safer to not let the octo get too friendly. I'd hate to be 'the guy who got bit by an octopus' although, it probably would have made me a lot more money.
 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,562
Reaction score
1,771
Location
Gainesville, GA
NATGEO Wild Discovery nice documentary on all extant cephs. Dated on some info but still quite informative.

 
Last edited:

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,562
Reaction score
1,771
Location
Gainesville, GA
Giant Pacific Octopus totally engulfs scuba diver
This incredible footage was recorded by Dennis Chow at Dillon Rock near the amazing Browning Pass, just north of Port Hardy on Vancouver Island, British Columbia. While exploring a wall during this particular dive, Dennis, Shaz and Wes noticed a Giant Pacific Octopus hiding among the rocks and plant life of the wall. These creatures can grow to a 16 foot span and weight upwards of 110 pounds. As you will see in this amazing footage, the creature had transformed to replicate his surroundings. The amazing part about this is that they are colorblind but are still able to duplicate the color and texture of their surroundings when feeling threatened by a predator.<br><br>These divers are extremely experienced scuba instructors and dive shop owners. At no time was this animal at harm, nor was it not at the top of their list of priorities of maintaining its safety and well being. Once Shaz began coaxing this creature out for a better look at his impressive size, you notice he too starts to "check out" Shaz by extending out a few legs to test what was near. Once he started to fully engage with Shaz, Wes was definitely near to ensure her safety at all times. Octopus will engulf its prey as this one did with Shaz, and then if its regular food, inject crustaceans like crabs with a paralyzing saliva then dismember them with their beaks.<br><br>This guy definitely had Shaz in his grip, until Wes decided it was time to help release him and go back to his normal habitat. Incredible!
 

tonmo

Titanites
Staff member
Webmaster
Joined
May 30, 2000
Messages
9,787
Reaction score
856
Location
Pennsylvania
definitely seems like something I would not want to be part of. Too many arms to reach and pry open things best left closed! :shock:
 

Forum statistics

Threads
19,891
Messages
203,915
Members
8,836
Latest member
texccv

Monty Awards

TONMOCON IV (2011): Terri
TONMOCON V (2013): Jean
TONMOCON VI (2015): Taollan
TONMOCON VII (2018): ekocak

About the Monty Awards
Top