View Full Version : keeping an octopus

01/04/2013, 10:02 AM
I am interested in keeping an octopus for the first time. What are the requirements for keeping an octopus? Tank size, substrate, water parameters... That sort of thing. I would like a beginners guide to octopus keeping

01/05/2013, 04:50 PM

01/08/2013, 05:36 AM
I've kept a Dwarf since end of August, life span is short around a year and usuall unknown age on purchase adds to the delema. Are very nocturnal, I use lower blue lighting tho also some fish. So far his staple diet is hermits least 5 a week fed 2 then 3. Caught a rare view of him this morning blended in on the rock, but lights on scurys away. Use a red light to view in evenings. Loads of fun.

At purchase


01/08/2013, 05:37 AM
Need minimum of 20 gallon tho 30 and above suggested. Needs rock to hide in, weight the lid as great escape artists?

Rare view but stayed in the light as obviously snagged a hermit!


01/08/2013, 06:46 PM
Thanks for the info guys. I don't think I'm gonna get one at this time. My wife doesn't want to spend the money on something that's only going to last a few months

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01/11/2013, 08:38 AM
Actually enjoying mine, viewed this morning with red light. Waiting for the Friday supply of hermits.

The $32 paid for him thought was rather reasonable. Only downside to me is are nocturnal so unlikely to see him daytime. Does a good job on sifting the sand bed, easy to trace his evening ventures.

Expense is the continual supply of hermits. My Dwarf is doing far better than I expected todate. I did switch to a lower level blue light so far doing fine, no algae issues last several months. The low illumination perhaps agreeable to the Dwarf, Fish are ok and just enough for mushroom and even a pipe organ soft coral.

01/25/2013, 12:57 PM
They won't outgrow a 20g ?

01/26/2013, 06:48 AM
only the smallest nocturnal dwarfs are ok in a 20-30g tank but other aquairum suitable species like aculeatus,biraieus and vulgarus require a 65-125g tank, 125 minimum for vulgarus.
i put a very small (3inch full armspan) babby aculeatus in a 45g hex tank and within 2 months he had totaly outgrown the tank and was constantly looking for an eacape after moving him to a 72 he settled down and was content in his new home. becides the space requierments octos produce alot of waste and put a bigger bioload on a tank that other animals so they require more water volume and filter capacity than fish or corals. most experienced keepers recomend a protien skimmer rated for 2-3x the volume of the tank to handle the extra waste and the posability of a large inking.

01/31/2013, 05:48 AM
Just for info have the smaller Dwarf Octopus, mines in an undersized 14G Bio. Tho glimpses in early morning prior to daybreak fun to catch him eating his favored meal, hermits. Mine purchased last year in August. Life span can be short but wouldn't trade the experience with this one. Arrived unannounced at local pet shop, unable to resist.

Don't suggest this small of tank, but an established tank at least 6 months before introducing one likely a priority. Be sure is rock for hiding, essential for this nocturnal guy.

Skimmers are suggested, my established system handles the bio load todate, but do weekly water change, not over 10 percent, unless needed abit more monthly, I monitor the soft coral etc.

01/31/2013, 06:16 AM
Thanks for the info guys. I don't think I'm gonna get one at this time. My wife doesn't want to spend the money on something that's only going to last a few months

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I bet she buys stuff that only lasts a few months lol

01/31/2013, 10:13 AM
I occassionally seeing live baby octopuses at the local seafood supermarkets. I would guess close to death, but are these dwarf ones? Wondering whether to try one in sump...

Black Thumb
02/17/2013, 07:09 AM
I want one too. Which one should I get? I have an 8g nano and a 273.6g.

05/07/2017, 08:47 PM
What's the longest someone has kept one for?

05/09/2017, 03:08 PM
Octopuses are short-lived; don't expect to keep one for more than a few months to a year, depending on how old yours is when you acquire it. I have an A. aculeatus in one of my office tanks (not listed in my sig), and I spent almost a year prepping the tank for his arrival, with the understanding that I'd likely only have a few months with him.

The best current all-in-one info source on keeping cephalopods is "Cephalopods: Octopuses and Cuttlefish for the Home Aquarium" (https://www.amazon.com/Cephalopods-Octopuses-Cuttlefish-Home-Aquarium/dp/0793806585), and tonmo.com (https://www.tonmo.com/)'s forums are the place to ask questions.

06/20/2017, 07:43 PM
About 10 years ago I got a bimac and within a few day it laid eggs. Stopped eating and died a few weeks later. Second one was the most amazing pet I've ever had. I had him for 8 months.
I remember getting some bait fish on a weekend trip and bringing them back for him. The small fish were very fast and he couldn't catch them in the open tank, but I would watch him think. Amazing. I saw him swim up when the fish was almost over top of him, and in its blind spot. He got it with the last two suckers on his tentacle and slowly caught them all.