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And arm lengths are about 2-2.5 Times thr length of the mantle. I'm thinking of picking up another tomorrow he seems to be doing great in tropical temps and loves my buffet of live crabs snails and shrimp
Be very cautious about putting two in the same aquarium if this is your intent. Of the species that have been tried on TONMO, only O. mercatoris has been successful and only if they were raised together or caught together. All other attempts have cost the life of one of the pair.
There have been more or less successful attempts at keeping O. vulgaris in multiples trying to raise them as food. However, these were very large tanks and some predation occurred. Mote did house a pair successfully but they were found very young and living together in the wild.
I have them in different tanks I know now the second one I just picked up is a male he's acclimating now. Not positive but from what I can see the first may be a female not sure gonna keep them away from eachother for sure though
The most serious cases of cannibalisim will likely be if a female is involved. If you are consider mating, view the Raising Octopus From Eggs subforum. From the little we have journalled, mating should be a controlled experiment and temporary "togetherness" but not housing them together. Tank size may be an important factor. Either way you decide, please continue to journal. Successful or not, it helps the keeping community.
Note that these are likely small egg animals and only a very limited number of species and small number of hatchling survival has been achieved (I have read of no cases where the few survivors have succeeded to live a full life span but there have been a few to survive to settlement and into the juvenile state). We keep experimenting though and this is not meant to discourage, just prepare.
Yeah, I am totally aware of what could happen if house together. And with the limited life time is a problem as well but I wish to keep them they are so fascinating I will definitely keep up on progress with both of them. Still can't wait to learn more about this and all octopus