Dose your Ceph react to the color you wear?

[CalvinC4S]

Weirdest thing; I walked up to feed my Bimac this evening in a black bath robe. It sucked its body flat against the rocks and stoped and sat still in fright. After this happening a few times I noticed it was the black bath robe. Has this happend to anyone else? Also happens when I wear my navy blue ball cap. I have had the octo for over 2 months and I think it is settled in.

 

[OctoMonkey]

Dunno about octopuses, but my cuttlefish used to hate my dog. she is pure white and when she walked past it would even make them ink sometimes. Guess cause white is a "scared" colour???

When the cuttles were going through their phase of spitting over the side of the tank, I could have sworn they were aiming for the dog too. But its mostly just bad luck I think

C

 

[cephalopoder]

Bimacs urn black when angry. They turn white when scared. They are brown/grey when happy. A big black shapeless robe most likely is a threat to your octo. I bet if you wore it every time you fed it it would soon see you are not a threat.

 

[jimichonga]

I've noticed the same thing

I've noticed the same thing

Every time I wear my yellow shirt my vulgaris wont come out and "play".

 

[CalvinC4S]

Where did you find the vulgaris?
What size tank?
How long have you had it?

I was at a public aquarium in Minnisota last year. They had what I belive to be a vulgaris. It was HUGE!! If I can support it properly, I plan to make a vulgaris my next Ceph.

 

[jimichonga]

I got it about a month ago from my LFS, on special order, (I think the owner of the shop actually goes out and gets most of his creatures himself).

For now I have him in a temporary 20 gal. until I move. I'll probably be getting a 200 gal. or so, for him. (he's small right now, but he's growing steadily)



Here are some pics:

http://www.reefcentral.com/vbulletin/showthread.php?s=&threadid=98776

http://www.reefcentral.com/vbulletin/showthread.php?s=&threadid=98569

 

[Gonodactylus]

Octopus don't have a color vision system, so dark blue, green or black doesn't matter. They are very sensitive to contrast and movement. A large, contrasty, moving object is probably one to be avoided.

As for recognizing a dog, unless it was a dogfish shark, it probably is just the contrast and movement.

On the other hand, there are data that show that some octopus can recognize different species of fish and react differently to them.

Roy

 

[CalvinC4S]

Wow, I thought cephs could see a wider spectrum then humans.
I am also under the impression that my bimac can distinguish me from other people, as the lunch lady.-Bill

 

[jimichonga]

Yeah, my oct can tell me apart from everyone else also.
The research I've done on octs show them to be HIGHLY intelligent and even capable of figuring out puzzles.

And even if octs weren't able to see color, neither can dogs, but they're able to distinguish the difference between objects, people, etc..

 

[Gonodactylus]

Octopus can see over a very wide spectrum, just not distinguish colors. We see color using three visual pigments each maximally sensitve in a different region of the "visible spectrum". Our brain compares the strength of signal coming in from each kind of receptor and that allows it to assign a "color" to a particular object. Stomatopods do the same thing, but use up to 16 different visual pigments. The octopus has just one kind of visual receptor, so all it can do is record on set of signals. It is like you using your rods for night vision.

Roy

 

[jimichonga]

I'm not trying to get in an argument over- if an oct can see color or not. (not a big deal)

That being said, just because something is "color blind" doesn't mean it can't distinguish detail (off the subject of the original post) Most animals in my understanding are "color blind", but still have some what sensitive/detailed sight.

 

[Gonodactylus]

The topic of this thread was "does your Ceph react to the color you wear". Since some of the responses specifically homed in on color, I tried to point out that size, motion and contrast were probably more important in eliciting responses. I certainly never equated "color-blindess" with a lact of visual acuity or the ability to discern objects and detail. The two have very little to do with one another except under very special circumstances (like a specifically designed color-blindness test).

As for whether most animals are color-blind, probably true if you include insects. However, of the large mobile animals on a reef, most fish have some color vision capability as do many crustaceans.

As for it not being a big deal if octopus are color blind or not, I suppose it isn't - unless you are an Octopus cyanea trying to hide from a grouper by turning brown against a green sponge.

Roy

 

[jimichonga]

Man, can we drag out a subject or what

My bad, I misunderstood your post "As for recognizing a dog,.... it's probably just the contrast and movement" and thought you were saying they basically live in a -world of shadows-

Hey, maybe next time we'll drag-out "Does my hermit crab have feelings" (not after my oct eats him hehehe)
LoL

 

[CalvinC4S]

"Does my hermit crab have feelings" .... Your going to have to start that thread. I'm over my "ignorant post" limit for the month.

 

[Rudiger]

Isn't it true that the octopus' vision is almost equal to human vision? I thought i had heard/read that somewhere. They cant see in color but i guess they can still pick up on a lot of detail, right? Wouldn't it just be like watching TV in black and white? How do they camoflague so well if they cant see color?