Octopus in tank lined with black dots
Do Invertebrates Have Emotions?
And how do scientists go about answering that question?
Do Invertebrates Have Emotions?
Do Invertebrates Have Emotions?

And how do scientists go about answering that question?

And how do scientists go about answering that question?

cephalopod
a Hawaiian bobtail squid (Euprymna scolopes) resting on a reflective surface
Reshuffled Genomes May Explain Cephalopods’ Smarts
Sophie Fessl | May 13, 2022
In two related studies, researchers describe huge chromosomal rearrangements and about 500 novel gene clusters in the octopus, squid, and cuttlefish genomes, which they say could help explain how they evolved their extraordinary brains.
Drawing of white squid-like animal in blue water
Ten-Limbed Octopus Ancestor Described, Named After Biden
Natalia Mesa | Mar 10, 2022
Octopuses were around 82 million years earlier than scientists previously thought—and had two extra limbs at the time.
octopus blue
What Scientists Learned by Putting Octopuses in MRI Machines
Chloe Tenn | Jan 20, 2022
The size and complexity of cephalopod brain structures differ depending on the habitats the creatures occupy, a study finds.
Cuttlefish, cephalopod, mollusk, mollusca, animal behavior, marshmallow test, cognition, intelligence, evolution
Cuttlefish Delay Gratification, a Sign of Smarts
Asher Jones | Mar 5, 2021
The cephalopods resisted temptation for up to 130 seconds to earn their favorite food, hinting at sophisticated cognitive abilities such as planning for the future.
Image of the Day: Vampire Squid
Emily Makowski | Sep 11, 2019
The unusual cephalopod was spotted on a recent underwater research expedition.
Image of the Day: Squid Skin
Carolyn Wilke | Mar 13, 2019
The cephalopods use several strategies to manipulate light and produce their colorful patterns.
Image of the Day: Dumbo Octopus Hatchling
The Scientist Staff and The Scientist Staff | Feb 21, 2018
The baby cephalopod looks and behaves like an adult from the moment it emerges from the egg.
Image of the Day: Cuttlefish Camouflage
The Scientist Staff and The Scientist Staff | Feb 16, 2018
The cephalopod’s unique ability to disguise itself relies on a single motor nerve exclusively dedicated to skin tension and papillary control.
Image of the Day: Brand New Pyjamas
The Scientist Staff | Aug 23, 2017
As it matures, this chromatophore-clad pyjama squid (Sepioloidea lineolata) hatchling will learn to use the color-changing cells that adorn its body to alter its appearance.
Cephalopod Genomes Contain Thousands of Conserved RNA Editing Sites
Abby Olena | Apr 6, 2017
Octopus, cuttlefish, and squid extensively edit messenger RNAs in an evolutionarily conserved process. 
Genome Digest
Amanda B. Keener | Aug 17, 2015
What researchers are learning as they sequence, map, and decode species’ genomes
Light Sensors in Cephalopod Skin
Kerry Grens | May 21, 2015
Squid, cuttlefish, and octopuses possess vision machinery in their skin.
Squid-Inspired Electric Elastomer
Jyoti Madhusoodanan | Sep 17, 2014
Polymer changes color and texture in response to remote signals. 
Cephalopod Coddling
Jyoti Madhusoodanan | Aug 1, 2014
Deep-sea octopus has the longest-known brooding period known for any animal species.
How the Octopus Keeps Its Arms Straight
Sandhya Sekar | May 15, 2014
Researchers uncover a self-recognition mechanism that prevents octopus limbs from becoming entangled, despite their powerful suction.
Groovy Color
Dan Cossins | Jul 1, 2013
To control their color displays, squid fine-tune the optical properties of light-reflecting cells by rapidly expelling and imbibing water across a tightly pleated membrane
Cephalopod-Inspired Robot
Jef Akst | Aug 17, 2012
A color-changing machine mimics the rubbery body and flexible movements of octopuses, squid, and cuttlefish.
Behavior Brief
Hannah Waters | Jan 31, 2012
A roundup of recent studies in behavior research