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Earlier quoted context omitted.
Merriam-Webster dictionary disagrees: https://www.merriam-webster.com/dictionary/octopus
Oxford Dictionary disagrees with Merriam-Webster: https://en.oxforddictionaries.com/definition/octopus
Here's another story/fact that should be included. There's a species of octopi that live in groups. On nights with bright moon, predators can identify them because they cast a shadow. They have evolved an organ to intake particular bacteria that use what's called quorum sensing to detect when there's enough of them around. When the organ is full of these bacteria, the bacteria glow and therefore stop the shadow of th…
The squid symbiosis is mentioned in the article. Oh and btw, it's octopuses or octopodes (greek not latin, fyi).
Earlier quoted context omitted.
Merriam-Webster dictionary disagrees: https://www.merriam-webster.com/dictionary/octopus
What's popular isn't always correct and dictionaries by definition reflect usage. That is unless it doesn't literally kill you that literally now actually means figuratively too.
Here's another story/fact that should be included. There's a species of octopi that live in groups. On nights with bright moon, predators can identify them because they cast a shadow. They have evolved an organ to intake particular bacteria that use what's called quorum sensing to detect when there's enough of them around. When the organ is full of these bacteria, the bacteria glow and therefore stop the shadow of th…
Social Octopuses? GTFO? Really? I must know more (as I am an avid octopus junky) and I thought that octopus were not social .. Got any more specifics?
Here's the wiki on the octopus species though. https://en.wikipedia.org/wiki/Euprymna_scolopes
Most all waves glow at night. But to see it with the naked eye you need proper darkness. Ocean + waves + darkness = bad idea. So i cannot suggest anyone go looking for this.
There are significantly different levels of bioluminescence. You see some regularly. Occasionally it's truly glowing. Once I saw it at incredible levels. I was fortunate to be with friends and a spot we could swim. We were diving from about 3m above the water and watching our bodies go through the water leaving these tunnels of glow. If you were the diver and looked back your skin was glowing. Very cool and I can sug…
Here's some dolphins for you (daytime though): https://www.youtube.com/watch?v=6lWmOhS83kU
Here's another story/fact that should be included. There's a species of octopi that live in groups. On nights with bright moon, predators can identify them because they cast a shadow. They have evolved an organ to intake particular bacteria that use what's called quorum sensing to detect when there's enough of them around. When the organ is full of these bacteria, the bacteria glow and therefore stop the shadow of th…
It seems weird because the animal itself would be a lot more visible.
This wikipedia article [1] about firefly squid says that the animal uses it's ability to match the brightness and colour of its underside to the light coming from the surface, making it difficult for predators to detect it from below
Is that it?
Here's another story/fact that should be included. There's a species of octopi that live in groups. On nights with bright moon, predators can identify them because they cast a shadow. They have evolved an organ to intake particular bacteria that use what's called quorum sensing to detect when there's enough of them around. When the organ is full of these bacteria, the bacteria glow and therefore stop the shadow of th…
> When the organ is full of these bacteria, the bacteria glow and therefore stop the shadow of the octopi. It seems weird because the animal itself would be a lot more visible. This wikipedia article [1] about firefly squid says that the animal uses it's ability to match the brightness and colour of its underside to the light coming from the surface, making it difficult for predators to detect it from below Is that i…
Earlier quoted context omitted.
Social Octopuses? GTFO? Really? I must know more (as I am an avid octopus junky) and I thought that octopus were not social .. Got any more specifics?
I could be wrong about that. I learned this in a microbiology course 10 years ago. So the focus was on the bacteria and the quorum sensing rather than the ecology of the octopus. Here's the wiki on the octopus species though. https://en.wikipedia.org/wiki/Euprymna_scolopes
The ocean is a fantastic place. We've recently crossed the Bay of Biscay under sail and have seen many pods of dolphins, bio-luminescence in our wake at night and the stars in a way you can only see far away from any source of light. Here's some dolphins for you (daytime though): https://www.youtube.com/watch?v=6lWmOhS83kU