#Octopus Cyanea

[todropscience]

OCTOPUSES PUNCHING FISH? A NEW LOOK AT INVERTEBRATE INTELLIGENCE

Collective behaviour, social interactions, and leadership in animal groups are often driven by individual differences. However, most studies focus on single-species groups, where individual variation is relatively low, with few studies focused on multispecies behaviours. A recent study has now revealed surprising social behaviour in the day octopus (Octopus cyanea). These octopuses are not solitary hunters—they collaborate with fish during hunts and, remarkably, have been observed punching their fish partners when they fall out of line.

Researchers observed these octopuses hunting cooperatively with various species of fish, including groupers and goatfish. Even more strikingly, the octopuses were seen physically punching fish that were not contributing effectively to the hunt, enforcing a form of social coordination previously undocumented in cephalopods.

This behaviour challenges traditional views of octopus sociality. Previously thought to prowl the ocean floor alone, using camouflage to ambush prey, the study indicates that the day octopus can form complex hunting partnerships with other species. The octopus does not lead these hunting groups but appears to enforce cooperation, suggesting a higher level of social interaction and intelligence than was previously understood.

These findings raise new questions about octopus cognition and social behaviour. The ability to interact in such a coordinated manner with other species indicates that octopus intelligence may share more in common with that of vertebrates than previously assumed. It also prompts further investigation into whether these behaviours are learned or innate, and how they might vary across different octopus species.

Gif: Octopus displacing fishes by punching them, by Eduardo Sampaio

Reference (Open Access): Sampaio et al. 2024. Multidimensional social influence drives leadership and composition-dependent success in octopus–fish hunting groups. Nat Ecol Evol 

[sitting-on-me-bum]

Day octopus (Octopus cyanea) ventral view portrait, Hawaii, Pacific Ocean.

Photographer: David Fleetham

[thoughtlessarse]

Dream team … a big blue octopus (its actual name, although it changes colour) hunts with two collaborators. New research has shown that octopuses, who are usually considered to be solitary creatures, sometimes team up with fish to hunt. Here, a blue goatfish (purple and yellow, on the left) acts as a scout, going ahead to scan for prey. A blacktip grouper (brown and white, centre) acts as the rearguard. ‘Nobody really knew that octopus have this sophisticated social life – not with other octopus, but with other species,’ said study co-author Iain Couzin - Photograph: Eduardo Sampaio/PA

Click source for more Week in Wildlife photos

[artbysahasa]

“Makana” Day Octopus Sculpture by Sahasa [2024] Handsculpted from Polymer Clay. ~Reblogs Appreciated~ Art Shop | Etsy Shop | Social

[pulsethebabyoctopus]

[werewolfsister]

Meenie Meeting

>.> sorry for the low quality oops

[dailycephalopods]

you should totally do octopus cyanea!!

Daily Cephalopod #207

[herpsandbirds]

Day Octopus (Octopus cyanea), family Octopodidae, Solomon Islands

photorgraph by David Liittschwager

[rjzimmerman]

Excerpt from this story from NBC News:

Octopuses don’t always hunt alone — but their partners aren’t who you’d expect.

A new study shows that some members of the species Octopus cyanea maraud around the seafloor in hunting groups with fish, which sometimes include several fish species at once.

The research, published in the journal Nature on Monday, even suggests that the famously intelligent animals organized the hunting groups’ decisions, including what they should prey upon.

What’s more, the researchers witnessed the cephalopod species — often called the big blue or day octopus — punching companion fish, apparently to keep them on task and contributing to the collective effort.

Octopuses have often been thought to avoid other members of their species and prowl solo using camouflage. But the study suggests that some octopuses have surprisingly rich social lives — a finding that opens a new window into the marvels of undersea life. It’s an indication that at least one octopus species has characteristics and markers of intelligence that scientists once considered common only in vertebrates.

[jetix]

Octopus cyanea, 2019-09-28

[echantedtoon]

Kny Mermaid Au Ramblings P4

I know more but I practically did every other well known demon slayer character in the series so I figured I'd do one last post explaining who the rest of the cast would be as mermaids. I've already done Akaza who's a Betta fish and Kaigaku who's a black electric eel. So now I'll be doing the rest of the demons and a lot of other characters. Lord have mercy for all the fish I looked up.

Remember all of the random lower moons in the ova series and Mugen train arc? Yeah. They're all minnow mers.

Now you're probably thinking Douma would be a rainbow fish right? Well I beg to differ and offer you my take. He'd definitely be a Fairy Wrasse mer.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://oceananimals.org/ocean-fish/wrasse-parrotfish/wrasse/fairy-wrasse/&ved=2ahUKEwjnq_PKusKGAxWMIEQIHR_jCskQr4kDegUI1AEQAA&usg=AOvVaw2YRDgIkmfKxDF7oBof4pf8

Nakime was a hard one but I think she'd be pretty as a black butterfly goldfish mer.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.petco.com/shop/en/petcostore/product/black-butterfly-goldfish-25-35-length-%2528carassius-auratus%2529&ved=2ahUKEwiQ9s_8vsKGAxXBHUQIHVDdBtsQr4kDegQIFxAA&usg=AOvVaw3BpMo0ntw0sPot4YwstgfD

Kyogai is a Black Drum mer.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://en.wikipedia.org/wiki/Black_drum&ved=2ahUKEwjs8fG2v8KGAxVkKEQIHZZEOY0Qr4kDegQIPRAA&usg=AOvVaw1Ip242VSs5Kmmf7IcyeJmp

Enmu is definitely an octopus mer. Specifically like the art by @cornfleaykes linked below.

https://www.tumblr.com/cornfleaykes/720378046334615552?source=share

Kokushibo and Yoriichi are the same thing being twins. Since Kokushibo is often associated with purple and Yoriichi orange, I found a fish that could match both of them. Both twins are Biota Orangetail Damselfish mers. Only Yoriichi has unusually more orange on his tail.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.algaebarn.com/shop/captive-bred/fish/biota-orangetail-damselfish-chrysiptera-cyanea/&ved=2ahUKEwiIgui4xMKGAxUzke4BHVgcABsQr4kDegQIZBAA&usg=AOvVaw30i-fXBi32NTynUJIaGegk

Daki and Gyutaro are vastly different to match their appearances. Gyutaro is a black Hagfish mer.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://glassvirtualzoo.wordpress.com/black-hagfish/&ved=2ahUKEwjYgdypxsKGAxXOEkQIHWhYF6kQr4kDegQIGBAA&usg=AOvVaw1uGruM_OsZQR1lXdwTSOYt

Meanwhile Daki/Ume is a Pink Dragon Siamese Fighting Fish mer because I liked how pretty and flowing the fins were and it seems to match her well.

https://www.shutterstock.com/image-photo/pink-dragon-siamese-fighting-fish-betta-384303799

Gyokko is a mutated Blue eel mer. That's it.

Hantengu was a tricky one. I know I already listed a WHOLE BUNCH of the Kny characters as Betta fishes but I'll go ahead and say that Hantengu and his clones would all be a pod of Betta fish mers related to each other because honestly Betta Fish can come in literally EVERY color. So Urami and Hantengu are black betta fish mers. Sekido is a red one. Urogi yellow. Karaku green but a lighter green than Tanjiro. Aizetsu blue. And Zohakutan is a dark purple color.

Urokodaki would be a common goldfish mer and Jigoro is like Zenitsu and Kaigaku an electric eel mer.

Hairou would be a blacktip reef shark mer.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.tetiaroasociety.org/island/fish/blacktip-reef-shark&ved=2ahUKEwjchKSFy8KGAxXz4ckDHX8GPDkQr4kDegUI6QEQAA&usg=AOvVaw36mXG9EcE-8peU273fAVTB

Muzan is a rare pitch black Bigeye Sand Tiger Shark mer like the one in the article.

https://www.newsweek.com/scientists-find-new-all-black-glowing-shark-species-ninja-lanternshark-409718

Rei and her daughter are both Brown Sweetlips mers.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.shutterstock.com/search/brown-sweetlips-fish&ved=2ahUKEwiS3POCzMKGAxWx7skDHaGFLogQr4kDegQIExAA&usg=AOvVaw3goHa1p3bOS5lBqxcq4ZAx

Haganezuka and the other sword smiths would be manta ray or sting ray mers mostly because I saw some art of Manta ray Mermaids and I think they'd look cool as them.

Rui and the rest of the spider demon are Albino Diving Bell Spider drows which turns out are a real species of spider that lives underwater.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.treehugger.com/nature-blows-my-mind-strange-scuba-diving-spider-4855467&ved=2ahUKEwjW68y8z8KGAxVKHUQIHRSQBwAQr4kDegQIExAA&usg=AOvVaw3T_2Bats74FtQgsKBBWGkX

Bonus mentions

Susamaru is an octopus mer too. Yahaba is a Cleaner fish mer. The swamp demon is just a trio of sea monsters. Tanjiro's ancestors in Yoriichi's flashbacks are Betta fish like the rest of Tanjiro's family. Tokito's father is a red herring mer. Sabito is a common orange Koi. Tengen's brother is a black butterfly koi mer. Monoko is a blue Glofish mer. And Giyuu's sister is the same species of mer as him.

Both Uta and Michikatsu's wife are both Rainbow Trout mers.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.wildtrout.org/content/rainbow-trout&ved=2ahUKEwjL2vXv0cKGAxU_GtAFHat1L9kQr4kDegQIGBAA&usg=AOvVaw1tXsb92zhaFmgDqHcmoWuo

And finally the Ubuyashikis. Amane and Their daughters are all white spotted jellyfish mers.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.crittersquad.com/fact-sheets/white-spotted-jelly-fact-sheet/&ved=2ahUKEwiY466vs8SGAxX748kDHfbqDk8Qr4kDegQIFhAA&usg=AOvVaw2_PbSrvezrdYdHFk1N7iKi

Meanwhile Kagaya and their son are water dragon hybrids.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.pinterest.com/pin/371406300502782906/&ved=2ahUKEwiyoqaDtMSGAxUJ5ckDHVROPSsQr4kDegUIygEQAA&usg=AOvVaw15b7fDD-PTuPL-qbgkndvL

Hoo boy. That was a lot. But I'm all done now explaining who everyone is in the mer au. Honestly it was fun coming up with these.

[identifying-sea-creatures]

5 instances of Tremoctopus Violaceus (common blanket octopus)

2 instances? of Mnemiopsis LeiDyi (sea walnut)

1 instance of Alitta Virens ( king rag worm)

1 instance of Trachipterus arcticus (medetarenean dealfish)

1 instance of Rossia Pacifica (stuby squid)

1 instance of Antiopella Cristatus (crested aeolis)

4 instances of Cestum Veneris (venus girdle)

1 instance of Teuthowenia Pellucida (googly-eyed glass squid)

1 instance of Periphylla Periphylla (helmet jellyfish)

1 instance of Peinaleopolynoe Orphanae (elvis worm)

1 instance of Cyanea Capillata (lions mane jellyfish)

1 instance of Tomopteris (gossamer worm)

1 instance of Sepioteuthis Lessoniana (bigfin reef squid)

1 instance of Clione Limacina (sea angle)

Regretably the third image of the post has escaped my powers.

These creatures are primarily cephalopods, and centophora.

Oh to be an iridescent sea creature 💚 💙 💜

[voluntarilyatirsk]

In the waters of the Red Sea, fish and octopuses are forming an unlikely alliance: They’re joining forces to track down prey, establishing a hunting operation that’s potentially more effective than either creature working alone.

With the octopus leading the charge, fish scout for hidden prey and signal where to capture a smaller fish or mollusk. But if freeloading fish are hovering around, looking to benefit from the hunt without contributing, the octopus punches them away, according to new research.

“The octopus basically works as the decider of the group,” Eduardo Sampaio, a researcher at the Max Planck Institute of Animal Behavior and lead author of the study, tells Nature News’ Helena Kudiabor.

The study, published on Monday in Nature Ecology & Evolution, brought a new type of collective behavior to light. Octopuses, often thought of as solitary creatures, led a group of various species of fish and discerned which ones were and weren’t helping.

“Nobody really knew that octopus have this sophisticated social life—not with other octopus, but with other species,” study co-author Iain Couzin, an evolutionary biologist and director of the Max Planck Institute of Animal Behavior, tells Popular Science’s Lauren Leffer.

Sampaio and his team collected around 120 hours of underwater footage during dives in the Red Sea. They filmed 13 scenes that showed a big blue octopus (Octopus cyanea) hunting with different fish species. And the various animals appeared to have distinct roles in the operation.

“These fish function as an extended sensory system for the octopus,” Sampaio tells Vice’s Mirjam Guesgen. “The octopus can basically sample or explore the environment just by watching them.”

One of the octopus’s biggest helpers was a species of fish called the blue goatfish (Parupeneus cyclostomus), which had strong team hunting skills. They would explore new crevices and show the octopus where to find prey by hovering over the area or moving from the crevice to the octopus and back.

“If the group is moving, everyone’s happy. It’s all good,” Sampaio tells National Geographic’s Melissa Hobson. Sometimes, other species of fish, most often blacktip groupers (Epinephelus fasciatus), weren’t as helpful and seemed to be waiting for others to do the work. In these cases, they would receive a jab from the octopus.

But it wasn’t just the octopus that was controlling members of the group—some fish would also displace others by darting toward them. Fish did not show aggressive action toward the octopus, according to the paper, suggesting the cephalopod was the dominant individual. The octopus seemed to decide whether or not the group would move to a new area.

When the hunting party identifies hidden prey beneath a rock, the octopus wraps its body around the stone, trapping the animal. This is standard hunting behavior for the big blue octopus, but when pursuing prey alongside fish, the cephalopod performs this wrapping action fewer times, the team found, presumably saving energy.

By getting deeper insights into collective animal movements, researchers can help conserve other species, says Marina Papadopoulou, a computational biologist at Swansea University in Wales who wasn’t involved in the study, to the New York Times’ Elizabeth Preston.

Still, the videos couldn’t capture whether the individuals in the hunting group remained the same. For future research, Sampaio and his team want to determine if the animals recognize each other, as it would add even more nuance and complexity to the interaction.

“Does this octopus like to hunt with blue goatfish generally, or does it really want to hunt with Martha, who is a good hunter, and not Steve, who is lazy?” he says to Popular Science.

The researchers have another gap they’ve been trying to fill: It’s difficult to determine the benefit each species is getting, or more specifically, who is eating the prey. The octopus gets the most benefit, they hypothesize, compared to hunting solo. Some fish get to make a catch if the prey escapes the octopus, per the New York Times. But they’re unsure if all fish get equal amounts.

For other scientists, like Hannah MacGregor, a marine animal-behavior researcher at the University of Cambridge in England, the work is already “really fascinating,” she tells Nature News, and it helps researchers gain a better understanding of “what would drive, in this case, groups of completely different species to stick together.”

----

[yo-sostenible]

Te leemos las noticias aquí Los peces actúan como un sistema sensorial ampliado para los pulpos, cubriendo zonas más extensas y mejorando la eficacia de detección de presas. / Eduardo Sampaio (Universidad de Lisboa Los investigadores realizaron 120 horas de inmersiones para observar cómo se organizaban estos animales en sus expediciones de caza conjunta. El nuevo estudio amplia la comprensión del liderazgo y la sofisticada vida social de estas criaturas marinas. Los pulpos suelen considerarse animales solitarios, sin embargo algunas especies cazan en grupo con otros peces, con los que surgen interacciones grupales más complejas que la del cefalópodo encabezando al grupo, como se creía. Un estudio que publica Nature Ecology & Evolution encabezado por Eduardo Sampaio de la Universidad de Lisboa y del Instituto Max Planck para el comportamiento animal (Alemania), indica que en esas partidas de caza mixta pulpos y peces parecen compartir el liderazgo. Observaciones anteriores sugerían que los pulpos lideraban la caza mientras que los peces normalmente los seguían, pero las observaciones realizadas por el equipo durante expediciones submarinas en el Mar Rojo indican que las interacciones grupales son más complejas. El equipo observó y documentó con 120 horas de inmersiones de 13 grupos de caza, formados por pulpos Octopus cyanea y peces como gallinetas o meros, en busca de moluscos o crustáceos, para estudiar si se establecía un liderazgo para los distintos tipos de decisiones. Roles especializados En estos grupos, la influencia social no está distribuida uniformemente, sino más bien estructurada jerárquicamente en múltiples dimensiones, lo que refleja roles especializados dentro del grupo, explicó Sampaio. Los peces, en especial la gallineta, son responsables de la exploración del entorno, dictando la dirección del grupo, mientras que el pulpo determina el momento y el inicio del movimiento de todos. Los peces actúan como un sistema sensorial ampliado para los pulpos, cubriendo zonas más extensas y mejorando la eficacia de detección de presas. Interacción beneficiosa Esta beneficiosa interacción permite a los peces capturar presas de otro modo inalcanzables y a los pulpos ahorrar energía centrándose en fuentes de alimento de alta calidad, a la vez que ejercen control y proporcionan retroalimentación dentro del grupo, “lo que pone de relieve la sofisticada dinámica de colaboración de la vida marina», destacó Sampaio. Un pulpo cyanea cazando con un pez cabra azul, mientras un mero de puntas negras está al acecho. El hocico de un pez corneta también es visible en la parte superior de la imagen. / Eduardo Sampaio (Universidad de Lisboa Sampaio indicó que aunque el Octopus cyanea es solitario, también puede exhibir una notable competencia social y flexibilidad cognitiva, adaptando su comportamiento en respuesta a las acciones de diferentes especies. Estos resultados, aseguró “amplían nuestra comprensión del liderazgo y la asocialidad, destacando la complejidad y adaptabilidad de las interacciones sociales en la naturaleza. Aunque se conocen otros tipos de manadas de caza mixtas, como tejones y coyotes, aves mixtas y morenas y meros, parecen ser menos flexibles desde el punto de vista del comportamiento a la hora de utilizar la información social para cambiar de estrategia en comparación con los grupos de caza de pulpos y peces. Referencia: Eduardo Sampaio et al. “Multidimensional social influence drives leadership and composition-dependent success in octopus–fish hunting groups”. Nature Ecology & Evolution (2024) Fuente: EFE

[gcldfanged]

It WAS SessionBox fucking carrd up.

Also, I'm going to make some changes to Jae's DirgeOnline verse: He is experimented on and as a result becomes able to mimic others' appearances (NOT their abilities, however), a skill he uses to get his targets in more vulnerable positions before killing them. He can also visually camouflage himself to blend in with his surroundings similar to Octopus cyanea.