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Octopus joubini (Atlantic Pygmy Octopus)


Staff member
Sep 4, 2006
DinoIgnacio;129815 said:
I highly recommend the Cephalopods book by Nancy and Colin. http://icanhaz.com/cephalopods
It's great and informative reading cover to cover! It covers everything you need to know about the more popular breeds of octopodes.

Mercs don't grow too big, they have an average mantel size of 1.75 inches. and have 2-3 inch arms.

You probably want a small LED lamp as the red lamps that are used for reptiles generate heat. Your octo will prefer a temperature of the lower 70s. I use one of these http://www.petdiscounters.com/Marina-Micro-LED-Aquarium-Light-Red-p7280.html
But after reading what D wrote, I think I will try red vellum over my other lights as well.
:thumbsup:I am beginning to feel un-needed (but I am still going to watch!) :mrgreen:.

We found that the velum will work when placed directly over the transparent cover if it will completely block the white light (aquarium and lighting setup are a big dependency). Be sure you use a velum that is rated for high temperatures (like the kind rated for tail lights in temporary automobile repairs - remember I am from the south ...). I found a good vendor on eBay if you don't find it locally.

Our two new members acquired their mercs from a fellow TONMO member, Danthemarineman. I believe the mercs are by-catch from the cultivated live rock where he works. Dan is not often on the site but if you click the link and look directly under his avitar, you will see Send Message followed by a drop down menu arrow. The drop down provides the option to send a message via email to be able to contact him directly.


Feb 17, 2011

I collected my own O. joubini in St Josephs Bay, FLA. These were collected in Jan and water temps were below 50 degrees F (froze my but off with just a wet suite). They were collected in about 2-3 feet of water snorkeling. They were hard to find at first but after you get the search image down I collected 8 specimens for some behavioral reserch in about 2 hours. I dont know about O. joubini from other locations - but in St Jo Bay they are known for taking over old snail shells where they will grab a small bivalve shell as well and use it as an operculum to close the door when they get in. They also will take two bivalve shells and hold them together like its a live clam. Fascinating to watch them manipulate all of this gear in an aquarium. When collecting them you learn to look for a clam or snail that doesnt look "right" or seems out of place. Easy to collect as you just have to pick up the snail/clam shells they are hiding in and place them in a container.

I had no problem keeping mine in seprate 20 gal aquaria. They fed readily on live hermet crabs collected nearby. They all survivied about a month in captivity and I understand that that is normal for a specimen collected as an adult. As I said - these were for research and not pets as such. Their feeding response seems to be activated by movement - so you might get them to take small pieces of fish or shrimp off of a long feeding stick dangled in view.

Unlike the vulgaris specimens I have kept - they seem to aclimate to the presence of an observer and will go about their business as though you are not there. They are active mostly dusk to dark and return to their adopted home with dawn if not before.

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