How Cuttlefish and Octopus Change Their Color

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=MSAtmyLKmG4

#cephalopod #cephalopodweek #cuttlefish #learning • Probably the best word to describe a cephalopod is Alien. Intelligent, fluid, and all around cool; they are remarkable on many counts. They can change the color of their skin nearly instantaneously with the use of chromatophores, which are special pigment containing cells. While chromatophores do color most animals, coleoid cephalopods: octopus, squid, and cuttlefish have taken chromatophore coloration to the extreme; they have layers of chromatophores they can control. Close to the surface are the normal chromatophores. Below are the iridophores, which are iridescent. Below these are these are they leucophores, which are really good at reflecting all light so create a white base for the cephalopods coloration. The system though is more complex than just layers of pigments. Each chromatophore cell is attached into a network of muscle fibers that can contract, spreading out the cell from a microscopic point to a much larger disk of color which covers up the white background and when used in conjunction with many thousands of these disks, give the cephalopod color. Using the layers of different pigments, the cuttlefish can overlay the solid colors creating whatever color pattern it needs, whether to perfectly blend in to stalk prey or avoid predators, or to stand out. With this understanding of how cephalopod skin works, we can now explain that incredible waves of color that cross the mantle of flamboyant cuttlefish. The brown chromatophores expand and then shrink in sequence like the wave during a sporting event. • I have wanted to make a video that can be the home of my footage of flamboyant and stumpy cuttlefish feeding on the internet and have tried a few times to do so, but never really satisfied, until I did this science education video. • Sources • NOVA, 2007. Cuttlefish: Kings of Camouflage. [television program] NOVA, PBS, April 3, 2007. (Transcript) • Deravi, L. F., Magyar, A. P., Sheehy, S. P., Bell, G. R. R., Mäthger, L. M., Senft, S. L., … Parker, K. K. (2014). The structure–function relationships of a natural nanoscale photonic device in cuttlefish chromatophores. Journal of The Royal Society Interface, 11(93), 20130942. doi: 10.1098/rsif.2013.0942 • Taylor, JD. (1969). The effects of intermedin on the ultrastructure of amphibian iridophores . Gen Comp Endocrinol. 12 (3): 405–16. doi:10.1016/0016-6480(69)90157-9. PMID 5769930. • Fujii, R. (2000). The regulation of motile activity in fish chromatophores . Pigment Cell Res. 13 (5): 300–19. doi:10.1034/j.1600-0749.2000.130502.x. PMID 11041206. • This video contains original footage and appropriated music • Music • Atlantis by Audionautix is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/...) • Artist: http://audionautix.com/ • If you like animals and nature Please Subscribe and Like • This is Backyard Expeditions. Here you can find wildlife footage and short documentaries on the natural world. Nature is full of surprises, often amazing things are happening just feet from you door. I am a biology student who was inspired by the likes of the BBC natural history unit, PBS, and animal planet as a Child. I have also long been a hobbyist photographer, filming interesting things over time. My goal is to document interesting behavior and highlight interesting species I encounter both in exotic locations, and on backyard expeditions. • Underwater Worlds • • Life Underwater • • Journey through the Undergrowth (Macro footage of insects and Arachnids) • • Insect and Arachnid Documentaries • • Bird Playlist • • How can Woodpeckers drill wood withou... • • Birding Playlist • • Playlist • • Conservation Playlist • • Fundamentals of Conservation Biology • • also Check Out my Photography Adventure Blog https://johnjacksonphoto.blogspot.com/

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