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Originally posted by baddmove
while i appreciate a good thread..
this was posted last year and got a lot of flags..
it was the same video also, even though it is gone now..
but always good to see this video..love it...
Originally posted by ZeuZZ
Uh oh, we've got another mimic! Completely different species and type of mimic though ...
May I introduce you to the Lyre Bird.
Click to watch.
Or direct on youtube here, start at 1:30
The octopuses maintained a camouflaged body pattern while swimming as well as when stopped. As noted in Figures 1 and 2, the animals were a Uniform Light or Stippled pattern that closely resembled the sand substrate. The color (light yellow/brown), pattern, and brightness matches to the sand were excellent, as judged by the human eye viewing the octopuses in situ and from photographic color images. In between each swimming session, the octopus stopped, often spread its arms, and became highly camouflaged. Figure 3 illustrates the high degree of camouflage of the flounder and the octopus when motionless. The flounders have small ovoid skin components that are, in small fish, comparably sized to small sand and gravel in this habitat, and thus they provide a close resemblance to the background.
The octopuses have far more control of their skin components and on this background produce a light, small-scale mottle skin pattern replete with small papillae (see Allen et al., 2009) that further enhance the textured appearance of the skin (see close-up in Fig. 3D). Note the light/dark recurring bars along the length of the arm in Figure 3D; this blends in well with the light and dark pebbles that constitute much of this “sandy” substrate. When viewed from a distance (i.e. ca. 1 m, as in Fig. 3C), the octopus pattern appears as a Uniform Light body pattern that closely resembles the background and produces the camouflage effect.
(A) Very small Bothus lunatus (directly in center of image) matching the brightness, color, and pattern of the sand.
(B) A larger B. lunatus (bottom center of image; ca. 23 cm total length) providing excellent general resemblance to the sand bottom.
(C) Macrotritopus defilippi in center of image, completely exposed yet well camouflaged.
(D) Close-up of the octopus in C; note the finely mottled body pattern, the dark bars on the arms, and the general difficulty of detecting the arms.
Thinking like an octopus
Summer swims prompt researcher to probe unusual intelligence
Octopuses have large nervous systems, centered around relatively large brains. But more than half of their 500 million neurons are found in the arms themselves, Godfrey-Smith said. This raises the question of whether the arms have something like minds of their own. Though the question is controversial, there is some observational evidence indicating that it could be so, he said. When an octopus is in an unfamiliar tank with food in the middle, some arms seem to crowd into the corner seeking safety while others seem to pull the animal toward the food, Godfrey-Smith explained, as if the creature is literally of two minds about the situation.
Peter Godfrey-Smith has been intrigued by octopuses for years, diving in and around Sydney Harbour during summer breaks in his native Australia. Stunned by the lack of scientific research on octopuses, Godfrey-Smith is now studying their intelligence, and whether their tentacles have minds of their own.
If you were an octopus, would you view the world from eight different points of view? Nine?
The answer may depend on how many brains an octopus has, or, to say it another way, whether the robust bunches of neurons in its coiling, writhing, incredibly handy arms bestow on each of them something akin to a brain. Is an octopus a creature ruled by a single consciousness centered in its large brain, or, by dint of its nerve-infused legs, a collaborative, cooperative, but distributed mind?
The idea of a distributed mind among animals is not new, according to Peter Godfrey-Smith, who focuses his efforts on the philosophy of science. Experiments indicate that when a bird learns a skill using only a single eye, and is later tested while being forced to use the other eye, the learning does not transfer well.
“This suggests that animal minds lack the cohesiveness that humans have,” said Godfrey-Smith, a philosophy professor at Harvard. “It may have something to do with consciousness. Maybe it acts as a unifying tool.”
Godfrey-Smith has been swimming with octopuses for years, diving in and around Sydney Harbour during summer breaks in his native Australia. It is only recently, however, that he noticed that supremely camouflaged octopuses were pretty common there.
“For years, I was swimming and diving in this area of Sydney Harbour. I had an idea they were there, but didn’t know what to look for,” Godfrey-Smith said.
Once he understood what to look for, he realized octopuses were all around. They’re so well-camouflaged, he said, it is best to look not for the animal, but for their dens. They often collect bits of marine debris — broken glass, tiles, and other hard substances — and put them out front.
“They’re watching us even if we’re not watching them,” Godfrey-Smith said.