Octpus Cyaneus

chrshlst

Pygmy Octopus
Registered
#1
Does anybody have any care guidelines for the Common Tropical Octopus? I hear they are a smaller species whose tentacles reach a length of 6", and that its total span is 12". Aparently, these octopi can be kept in a 30 gallon, hence my intrest! I also need to know where a dealer of this species is. ANY input would be extreamly helpful. Again, thank you....and GREAT site!
 

Nancy

Titanites
Staff member
Moderator
#2
Hi,

I think there must be some confusion here. Octopus cyanea is a larger octopus (body to at least 6 1/2", arms to at least 31 inches) and is found around Hawaii and the Indo-West Pacific region. That means we don't see it here in U.S. much.

It's difficult to find a small tropical octopus on sale here. Since the local fish stores don't know their species. they can't really tell you what you're getting. If you want a wild-caught octopus, spring is the time to try for a young one.

Nancy
 

chrshlst

Pygmy Octopus
Registered
#3
thanks. I guess I should listen to the professionals. Just for informational purposes, this information came from The Marine Aquarium Problem Solver by Nick Dakin. Tanks, I mean thanks!
 

Colin

Colossal Squid
Supporter
#4
i have seen that in the book too.

he has his facts all wrong... its not cyaneus its cyanea and as nancy points out his size is miles out!!!

i would class cyanea as a large species
 

clownfish

Vampyroteuthis
Registered
#6
yes there is an octopus cyaneus I actualy have a book hear The Marine Aqarium Problem Solver by Nick Dakin it grows 1 foot tentical to tentical its care guide is just like any other octopus so it says
 

Nancy

Titanites
Staff member
Moderator
#8
Clownfish, this just proves that you can't trust everything you read in books. There is no such thing as "just like any other octopus" - different species have different requirements. There are octos that require very cold temperatures, like the ones Jean keeps in New Zealand. There are tropical octopus, and many in between. I have never found a totally accurate description of octos and their care in general aquariium books, even those about reef aquariums.

Nancy
 

Neogonodactylus

Haliphron Atlanticus
Staff member
Moderator
#10
I've kept a few O. cyanea over the years and they have three things going against them. 1). They do get big. In several months the 3 cm juvenile that you start with will have a 10 - 12 cm mantle and an arm spread of 50 cm. If it has a large tank and continues to grow, they can reach much larger size.

2) They produce huge amounts of ink. and Adult can turn a 200 gal tank completely dark.

3) They bite. I think I've posted before my story of one that got loose on a flight from Hawaii to SFO. Trying to put an unhappy octopus back in a small-mouth container with screaming flight attendants and blood running down your arm makes for an interesting flight.

On the positive side, few octopus can rival a small O. cyanea in the range of colors, patterns and textures that they can assume.

Roy
 

Octomush

Vampyroteuthis
Registered
#11
Wow! I didnt know they got so large... When I kept mine I had the very same problem with inking. Almost EVERY time I put them in my tank they inked! I sorta found a solution for this if u are taking them out of the wild. Although u risk losing ur catch its better than letting them ink up the tank. When u catch them u have to milk them for their ink... Sorta. U have to release them back into the water then let them ink and catch them again, and do this over and over untill they have no more ink. As for biting I was never bit. But they were always so weak and timid after that long tramatic fight.
Also, have u ever seen them turn white and black? It's spectacular!
 

clownfish

Vampyroteuthis
Registered
#12
this sounds like a cool octopus what size tank do they need? I now a little about octopus cyanea. I thought they wre to different octopus one small one big what ever
that does sound like a cool octopus
 

Naomi&Joe

Blue Ring
Registered
#15
And there was me all happy with my brand new (and first) octo. We have just got - according to our LFS - an O. Cyaneus. And I have to say its absolutly f**king fantastic! It is so active, in the evening before the lights go out, and afterwards, it interacts with me, and it seems so friendly too, and the colour and texture changes are incredible! I was thinking it was clearly an adult, as its reasonably big, but reading all the above, maybe not! But it hasn't inked yet, and does seem happy. It's been eating shrimp, and has made a den etc. Hard to say what the leg span is, as it depends on how far it stretches... but at least 6-8inches I would think.
 

Neogonodactylus

Haliphron Atlanticus
Staff member
Moderator
#16
If this is indeed an O. cyanea, it will grow rapidly. It is not uncommon on the reef to find them weighing 5-6 kg and I caught one on Manihi a few years ago that probably went 8 kg. We coralled it just after it killed and was eating a 45 cm green turtle.

Roy
 

Naomi&Joe

Blue Ring
Registered
#17
Not good. If they grow as big as you say then we are in trouble. But - responsible LFS people who do know about keeping octos in uk sold it to me, knowing how big our tank is (about 50 US gallons I think). Until then I will enjoy it, and if it gets too big will find it a better home. But it looks happy as Larry at the mo. He is a joy to watch, and has survived the first 3 days in his new home, so there should be hope.
 

Naomi&Joe

Blue Ring
Registered
#19
Hi Mikey, We got him from our LFS, The Acquatic Centre Ltd in Bulcote, Nottinghamshire. They are supplied by TMC. They have been excellent sources of info. We set up our first (freshwater) tank through them, and when we fell in love with an Octo they had in stock they advised us about setting up a marine tank specifically for one, which has been an ongoing process since last October. This is our first marine tank, so its been a steep learning curve to say the least. However, I would recommend them highly, not least for their Cephalopod knowledge and ability to refuse to sell me things that I liked because they wouldn't be suitable for a Cephalopod tank, but also because they are very gentle with severely hungover customers on Sunday mornings, and can also tolerate stroppy 5yr olds!
 

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