Strange octopus

teuzzo

Hatchling
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Apr 28, 2009
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During a night dive in Philippines, i filmed a strange octopus.
It was in 1,5 meters of water in sand and rock bottom.
Its size resemble those of the blue ring octopus.
I was very impressed by his behavior.
Compared to the other octopusses, it did not camouflage with the bottom but it relesed a strange skin effect.
Frequently a dark row start from its head and goes down till the front arms like a flash.
I had the impression that he told me: be careful, i am dangerous!
Is it possible that this octopus is poisonous?
Like the blue ring and the flamboyant cuttlefish.

You can see a part of my video here: http://www.vimeo.com/4181085

Let me now if you know this octopus and if its behavior is known.
 

teuzzo

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I don't now, maybe a seastar's arm?
But do you know this octopus?
And do you know his behavior?
Is it an octopus aculeatus?
 

Taollan

Vampyroteuthis
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The display pattern is called the "passing cloud" display. I have seen it in Octopus cyanea, O. bimaculoides, and rarely in O. rubescens. Cuttlefish will also do this (look on youtube for "passing cloud")
There have been paper published on this display, see http://journals.cambridge.org/downl...11a.pdf&code=aafa2f8ff61f6e9c9a01ec5fab104dcd . If you can't get to it by that link, let me know.
I really can't say right off the top of my head what species it is. Arm length, frontal white spot placement and body shape make me think that it is in the Octopus vulgaris species complex, or closely related, but I am really just speculating.
 

teuzzo

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Thank you Taollan, you have a private message.
I would like to know everything about this behavior and this octopus.
 
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Oct 13, 2005
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From this video, I don't think that it's supposed to look like a passing cloud going by overhead. How many clouds actually go that fast? It flashed the line every time it touched down and held still for a moment. It seems like it was trying to make it's outline more indistinct or something.
 
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