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Deployable web distracts predators: blanket octopus

The membrane attached to some arms of the blanket octopus serves as a defense mechanism because it expands to distract predators and can be shed if necessary.

BIOMIMICRY TAXONOMY
Summary
"The appearance of the female is striking due to the wide, deep web attached to arms I and II (Portmann 1952), for which the name 'blanket' or 'handkerchief' octopus has been given (Voss and Williamson 1971). The web is most extensive between arms I and II and it can be expanded or contracted to a remarkable degree. Contractions of the web are due to transverse bands of muscle, each surrounded by elastic fibres which probably allow the web to expand after autotomy. Besides this the edge of the web, parallel with the arm, has a row of 'pouches' lined by glands; these may have a role in the attachment of the clusters of stalked eggs (Portmann 1952). Autotomy of the web occurs along visible fracture lines when the animal is distressed. The dorsal arms and web are held rolled back when the animal swims, but spread out if disturbed. The web undoubtedly has several functions, as it does in Argonauta…The web when fully extended was 600mm long and 300mm wide, and the animal had a mantle length of 180 mm." (Nixon and Young 2003:324)
About the inspiring organism
common blanket octopus
Tremoctopus violaceus Chiaie, 1830 in 1823-1831
Common name: Common blanket octopus

Learn more at EOL.org
Some organism data provided by: ITIS: The Integrated Taxonomic Information System
Organism/taxonomy data provided by:
Species 2000 & ITIS Catalogue of Life: 2008 Annual Checklist


Bioinspired products and application ideas

Application Ideas: Deployable structures, packaging designs for soft or flexible products, strategies to distract agricultural pests.

Industrial Sector(s) interested in this strategy: Building, packaging, agriculture

References
Nixon, Marian; Young, John Zachary. 2003. The Brains and Lives of Cephalopods. USA: Oxford University Press.
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