All articles tagged with #octopuses
A team analyzing 79 cephalopod species finds bigger brains are more tied to ecological complexity—habitat type, depth, and foraging rewards—than to social interactions, supporting a new asocial path to brain evolution and challenging the traditional social brain hypothesis.
New fossil analysis of Late Cretaceous octopus jaws, aided by high-resolution tomography and AI, shows early octopuses reached up to 20 meters in length and were apex predators that crushed hard prey, pushing back octopus origins to about 100 million years ago and suggesting complex, early cognitive behaviors.
Researchers from Hokkaido University analyzed Late Cretaceous finned octopus jaws found in Japan and Vancouver Island using high‑resolution tomography and AI. They estimate these ancient cephalopods reached up to ~20 meters and were top predators alongside dinosaurs, with jaw wear indicating repeated, forceful predation on hard prey. This challenges the view that invertebrates were minor players in the Late Cretaceous marine ecosystems and suggests giant, apex invertebrate predators existed in that era.
The article explores eight marine animals, including octopuses and sea cucumbers, that have blood of colors other than red, highlighting the diversity of blood pigments in the animal kingdom.
Research shows that octopuses do not have a dominant arm but tend to use their front limbs more for exploring and their back limbs for movement, with no preference for right or left in the wild, highlighting their limb versatility and redundancy.
Scientists conducted the most comprehensive study to date on octopus limb use, finding that while they do not prefer one side over the other, they tend to use their front arms more for tasks like reaching and curling, and their rear arms for locomotion, demonstrating high flexibility and task-specific limb coordination.
A study analyzing videos of wild octopuses reveals they do not have a dominant arm but prefer using their front arms for exploration and their back arms for movement, with no preference for right or left in natural settings, highlighting their complex limb functionality and adaptability.
Octopuses are generally solitary but can form groups called a consortium, especially in shared habitats like the underwater city Octlantis off Australia, showcasing complex social behaviors. The term 'octopus' derives from Greek, meaning 'eight foot,' and while 'octopi' is commonly used, 'octopuses' is the correct plural in English.
Scientists in Japan discovered that octopuses can be fooled into thinking a fake arm is their own, responding defensively as if hurt, which suggests they possess a multisensory sense of body ownership similar to humans and mammals. This finding highlights the complex and independent development of their nervous system and offers insights into the evolution of body perception.
A recent study shows that octopuses, like humans, can be tricked by the rubber hand illusion, suggesting they possess a form of body awareness and self-modeling despite their vastly different neural architecture, challenging assumptions about consciousness in animals.
Research shows that octopuses can experience the rubber hand illusion, indicating they have a sense of body ownership similar to humans, which could provide insights into the evolution of self-perception and have applications in robotics and understanding neurological disorders.
A study reveals that octopuses can taste chemical cues from microbes on surfaces like prey and eggs, which helps them decide what to hunt or nurture, highlighting the role of microbiomes in animal behavior.
Scientists discovered that octopuses use their arms to taste and detect microbiomes on surfaces, helping them identify prey and assess their environment, revealing a sophisticated microbial sensing ability that influences their behavior and interactions.
New research reveals that octopuses expend significant energy when changing color, comparable to a human's calorie burn during a 30-minute jog. This study, using ruby octopuses, measured oxygen consumption during color changes, highlighting the energetic cost of their sophisticated camouflage system. The findings provide insights into the biological trade-offs octopuses make for survival, as their color-changing ability is more energy-intensive than similar adaptations in other animals like chameleons.
Scientists suggest that octopuses could become the dominant species on Earth if humans were to go extinct due to their intelligence, adaptability, and dexterity. Professor Tim Coulson from the University of Oxford argues that octopuses possess the necessary attributes to evolve into a civilisation-building species, potentially creating underwater cities and developing methods to hunt on land. While this is speculative, octopuses' advanced problem-solving skills and ability to adapt to changing environments make them a strong contender for future dominance in a post-human world.