how they change color

Wow the future applications of this research can be limitless, especially in military applications.
 
this really is blowing my mind. They are basically manipulating a thin halocline over the surface of their entire body to change their appearance. If you aren't a diver who has been in a place where freshwater meets salt (cenote, chac moul for me ((so awesome))), you probably never heard that word, but it's the blur you see when you add your ATO water or mix saltwaters of different concentration. I think it happens because water density affects the absorption rate of the different wavelengths of light. I have always been a HUGE fan of Cephalopoda and this just further solidifies their position of coolest animal in general. If I didn't personally believe they may be sentient I would totally set up a squid or octo tank. Many years ago I got to dive with a marine biologist that was studying octos off Maui and just had my mind blown by their uniqueness and their amazing abilities. so cool.
 
I know exactly what you mean! Beautiful creatures, but I am wary of keeping a creature that intelligent in anything less than perfect conditions - as in, their natural habitat. (Not that I look down on those that do, just a personal thing.)
 
Herbie said:
this really is blowing my mind. They are basically manipulating a thin halocline over the surface of their entire body to change their appearance. If you aren't a diver who has been in a place where freshwater meets salt (cenote, chac moul for me ((so awesome))), you probably never heard that word, but it's the blur you see when you add your ATO water or mix saltwaters of different concentration. I think it happens because water density affects the absorption rate of the different wavelengths of light. I have always been a HUGE fan of Cephalopoda and this just further solidifies their position of coolest animal in general. If I didn't personally believe they may be sentient I would totally set up a squid or octo tank. Many years ago I got to dive with a marine biologist that was studying octos off Maui and just had my mind blown by their uniqueness and their amazing abilities. so cool.
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They're definitely some of the coolest creatures. I've only seen FW mixing with Salt on TV mostly, but also in Florida when I lived down there.

There was one documentary I was watching where they had a submersible travel to a really deep location in the Caribbean, and they came upon what looked like a lake on the sea floor! It turned out it was super saline water! Pretty cool stuff. There was also a pretty cool video in South America, I want to say it was filmed on the Amazon River, but I'd probably be wrong without actually looking it up. But in a nutshell, two rivers met and for a pretty good distance, there were two different colored waters that were not mixing. One river was brown, the other not. They eventually mixed further down stream though.

So many cool things on this planet. It's a shame that more people aren't amazed by them.
 
cenotes are sinkholes that expose underground rivers of rainwater that have cut through the limestone underground. It all the rainwater running out to sea basically. when you dive in them there is ocean water that is being pushed down by the heavy FW coming in. the FW is super pure because it is filtering through miles of rock but the SW is right from the ocean just a few hundred feet away from the sinkhole. People have drown because they come up through the halocline into the pure water and think they are in an air pocket (which there are all over and part of the fun). They pop up and pull out their regs and take a breath, but they're still 3 feet underwater. oops. I guess i don't know anyone who actually did that, but it's a story there and having dived in it I can totally see how you could do it. Highly recommended fun of you are ever in cancun or playa del carmen. LOL.
 
Hahaha, too true!

And yeah Erik... that would truly suck... total mind-f*** way of going, so, somewhat a plus, but still... dying isn't exactly a plus normally, regardless of how you slice it.
 
when you first go in to the cenotes there are huge scratch marks on the walls of the cave. the story I was told is that the indigenous people used to challenge themselves as a rite of passage to go as far into the cave as they could swim while holding their breath to make a mark with a rock. they believed the cenote was an entrance to the world of the dead so it was sort of thumbing their nose at death. There are tons of marks within the first 50 feet or so, but then the guide showed us the really deep ones as we went along. Some of them were HUNDREDS of feet into the passages. Even around turns and stuff. That is some serious cajones.
 
the lack of oxygen causes euphoria before you die same reason people get high from huffing. I used to worry about drowning as a kid in lake Erie till I found that out.
 
1mg said:
the lack of oxygen causes euphoria before you die same reason people get high from huffing. I used to worry about drowning as a kid in lake Erie till I found that out.
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maybe suffocating on a gas that is close in density to water, but filling your lungs while diving would certainly not be as peaceful as all that. I would almost certainly guarantee the suffocation would be more from the heart stopping than from the lungs being unable to exchange gasses. (sort of like people who fall off tall things). Either way, no thanks. I'd prefer a direct artillery strike without knowledge of the incoming round. :)
 
I was asleep on a road trip and my ol lady hit black ice and started spinning and she woke me up freaking out. I told her next time just let me die don't wake me up. we got lucky on which side we went off. if it was the other side it was a 15ft hill.
 
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