So this Squid and this Chameleon walk into a saloon...

Actually, I guess the Squid would swim in. Maybe it was a pool bar... oh forget it.



The question we should be asking is what do they have in common, why are they lumped together in this social setting? Some of you already know - They can both change colors. While Chameleons are far more hyped for their ability - I guess they're considered more cuddly - Squid (and octopuses by the way) have the same ability.



Very interesting. Didn't know there would be a reason to, but it's mainly the same two reasons as their air dwelling compatriates. To either draw attention to themselves, or dismiss it. So big deal, right? Lots of animals do things to change their appearance. Yes, I say to the imaginary voice in my head. But how?



Ahhh. We are now at the crux of my learning for the day!



Chromatophores: As Ellen J Prager tells us:

A number of cephalopods--the group of animals that includes octopuses, squid and cuttlefish--are skilled in the art of color change, which can be used for camouflage or to startle and warn potential predators in their undersea realm. Many of these creatures have special pigment cells called chromatophores in their skin. By controlling the size of the cells they can vary their color and even create changing patterns. Chromatophores are connected to the nervous system, and their size is determined by muscular contractions. The cephalopods also have extremely well developed eyes, which are believed to detect both the color and intensity of light. Using their excellent eyesight and chromatophores, cephalopods camouflage themselves by creating color patterns that closely match the underlying seafloor. In squid, color changes also occur when the animal is disturbed or feels threatened.

Pretty talented, huh? But wait! There's more!

In addition to color control, many of the squid can produce light and control its intensity. ... Bioluminescence may also offer a means of communication in the dim midwater or twilight region of the sea. Squid and other marine creatures create light by mixing two substances into a third that gives off light, similar to the mechanism by which a common firefly lights up or the way the popular plastic green glow-sticks work.

I'll never look at my fried Calamari quite the same way again.