An octopus can be a canny customer – by shortening, bending, elongating and twisting its highly dexterous arms it can catch prey, build a shelter and even open jars. The dazzling array of delicate tasks that they can perform is well documented, but how exactly do they do it? Yoram Yekutieli and colleagues at the Hebrew University and Wiezmann Institute of Science in Israel built a series of oct...

Digestive physiology is one of the bottlenecks of octopus aquaculture. Although, there are successful experimentally formulated feeds, knowledge of the digestive physiology of cephalopods is fragmented, and focused mainly on Octopus vulgaris. Considering that the digestive physiology could vary in tropical and sub-tropical species through temperature modulations of the digestive dynamics and nu...

How an octopus performs complex movements of its eight sucker-studded arms without entanglement has been a mystery. A new study has found that self-recognition of the octopus's skin by its suckers inhibits reflexive grasping of its own arms, simplifying the mechanisms needed to generate intricate arm behavior.

The authors report neuromuscular manifestations in a 45-year-old woman after consuming octopus meat (Octopus sp.). The patient presented malaise, paresthesias in perioral and extremity areas, intense muscular weakness and arterial hypotension, followed by severe itch and disseminated cutaneous rash. Gastrointestinal manifestations and fever were not observed, reducing the probability of aliment...

In this demonstration, we present Octopus, an interactive dashboard and visualization tool for Wireless Sensor Networks. Octopus helps developers with network debugging, network assessment, and gaining an understanding of network topology and routing patterns. For the final users, it provides a user-friendly tool to localize nodes, formulate application queries and tune parameters according to ...

This paper explores the use of Octopus in Hong Kong (HK). There are over 7.4 million cards sold and 7 million of these are active. The study examines how transport and other sectors can enhance their services through Octopus. Six of the 40 organisations using the Hong Kong Octopus card were interviewed. A convenience sample of 800 actual and potential Octopus customers was sent a questionnaire....

PURPOSE To determine diagnostic accuracy of kinetic visual field assessment by Octopus 900 perimetry compared with Goldmann perimetry. METHODS Prospective cross section evaluation of 40 control subjects with full visual fields and 50 patients with known visual field loss. Comparison of test duration and area measurement of isopters for Octopus 3, 5, and 10°/sec stimulus speeds. Comparison of ...

Here we report bipedal movement with a hydrostatic skeleton. Two species of octopus walk on two alternating arms using a rolling gait and appear to use the remaining six arms for camouflage. Octopus marginatus resembles a coconut, and Octopus (Abdopus) aculeatus, a clump of floating algae. Using underwater video, we analyzed the kinematics of their strides. Each arm was on the sand for more tha...

The coastal octopus at Saint Paul and Amsterdam Islands is Octopus vulgaris Cuvier 1797. Meristic and morphological characters, along with phylogenetic analysis of COI and COIII DNA sequences, were used to identify 11 animals collected in 2000 or 2001. The range of the species is therefore expanded to include the oceanic islands of the central southern Indian Ocean. The trees also depicted the ...

The octopus is a marine animal whose body has no rigid structures. It has eight arms composed of a peculiar muscular structure, named a muscular hydrostat. The octopus arms provide it with both locomotion and grasping capabilities, thanks to the fact that their stiffness can change over a wide range and can be controlled through combined contractions of the muscles. The muscular hydrostat can b...