Science & Technology

Watch the squids keep an eye out and move with them on the line of defense


Squids have a reputation for being fairly lonely cephalopods. However, new footage reveals that a group of wild squids are forming a herd for migration, suggesting that they are more social than we thought.

Grouping is common throughout the animal kingdom, foraging, avoiding predators, Meeting for mating.. In cephalopods, behavior is primarily related to squids, which form thousands of herds. Like octopuses, squids almost prefer to explore the world on their own and rarely witness social behavior among them.

Christian drerup With Cambridge University Gavan Cook The Cephalopod Citizen Science Project collected a series of reports, photos and videos from scuba divers off the south coast of the United Kingdom showing 10 examples of Cuttlefish herds (Sepia Officinalis).

“The literature is very dogmatic about what cephalopods do and don’t do, and you accept it until you see things with your own eyes,” Cook says.

In the video, I could see the squids moving together in a series of formations. Some are divided into as many as 30 groups. Sometimes they formed a horizon so that one squid was facing in the opposite direction. Probably acting as a guard While others are sleeping. Also, the squid became spherical and turned outward in all directions, like the testudo of the ancient Roman army. sometimes, squid Drifted away before returning to the group structure.

Observations took place from August to September 2013-2020, when these squids began to move from shallow coastal farms to deeper waters of the English Channel and off the north coast of France. “Shoreing allows for the defense of selfish herds,” Cook says, providing a number of safety measures for the various predators along the journey. It will probably improve navigation and provide opportunities for social learning.

Journal reference: Ethology, DOI: 10.1111 / eth.13226

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Watch the squids keep an eye out and move with them on the line of defense Watch the squids keep an eye out and move with them on the line of defense

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