Hachi - Nocturnal Bimaculoides?

Discussion in 'Cephalopod Journals' started by abdopus147, Apr 4, 2012.

  1. abdopus147

    abdopus147 Blue Ring Registered

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    Hi, I am currently keeping a wild, small bimaculoides in a mature 55 gallon, hexagon-shaped tank. Though it has been a month, it only shows up at night to feed on live crab and specific frozen foods. He has eaten live food from my hand, he's even touched my hand and definitely knows I am here. I thought they were diurnal? Does it just need more time to get used to its fairly new environment?
    Thanks,
    Cameron
     
  2. CaptFish

    CaptFish Colossal Squid Staff Member Moderator

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    yup


    when he touches he can taste you....yummy biped...
     
  3. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    I've only kept one bimac and even before Diego's eye problems he was more crepuscular than diurnal. Now he is mostly blind but one eye is light sensative and he does not come out until the tank lights and the overhead light are off. Other lighting in the room does not seem to bother him. Diego is a special case but it makes me suggest trying to turn off the tank lights, leaving the room lights on to see if the tank is overly bright for his sensativities.
     
  4. abdopus147

    abdopus147 Blue Ring Registered

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    Thanks guys. I am now wondering how long do you think it will take for him to get used to the tank. Also, I don't really use my tank lights and have tried to go a day by just using the sunlight, he still didn't come out. I have also seen him a few times around 6:30. I will take your advise and try it out. Thank you for your feed back.
    From,
    Cameron
     
  5. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Cameron,
    They are all anywhere from slightly different to extremely different :lol: and age at introduction to the tank makes a lot of difference. My undocumented guestimate for initial tank acclimation is 2 full weeks and I am never comfortable with the success of the physical introduction until day 15. If the animal is an adult, day/night patterns should begin to be obvious but not before this "break-in" period and the behavior during that time cannot be assumed as what to expect afterwards. Often they will appear quite friendly and then disappear, especially if they are less than 5 months old.

    I have found that very young octopuses of several species hide and appear anti-social up until somewhere between 4 and 5 months and day/night patterns are not clear or they appear totally nocturnal. As young juveniles they seldom leave the rock and you may only see them at feeding time. At some magical point they seem to blossom into social animals very quickly and I often use this behavior change as an age gauge. An adult octopus will interact within a month (vague approximation) if it is going to interact, some never do.
     
  6. abdopus147

    abdopus147 Blue Ring Registered

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    Thank you for your advice. The octopus is only 4 inches long, approximately how old is that for a bimaculoides? I've heard they grow up to 2 feet, so it must be pretty young. It acts just the way you described; showing up at times like 7:30 p.m. to 11:00 p.m., even at 6:00 a.m., it is sometimes friendly, but has not broken into its tank. Sometimes he seems uncomfortable and sometimes acts as if I'm not there. He hunts with little enthusiasm to chase after his prey and eats from 5 to 3 crabs.
    From,
    Cameron Joe
     
  7. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Diego was pretty small when I got him a year ago and my journal mentions that he started being more social after a month. I don't have any size notes and photos don't help a lot without a reference but you might flip through the journal for isolating a similar behavior. However, Diego has twice shown a problem with his eyes, the second problem left him almost blind so I can't say that he is typical (in addition to being the only bimac I have kept). Joe-Ceph would have more experience with the species and you might PM him to bring his attention to the thread.
     
  8. abdopus147

    abdopus147 Blue Ring Registered

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    Again, thanks. I have had it for a month now, its name is Hachi (meaning eight in Japanese), and it still fears/ doesn't pay attention to me. It's weird, anyways he doesn't come out at day time either. What are the signs for an octopus breaking into its tank? How long should I wait before I know he will never get used to captivity? Could I still release it into the wild for its own sake?
     
  9. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    abdopus, I move Hachi's thread to our journals - hopefully you will include some photos and continue to record his/her progress.

    Releasing any animal back to the ocean after keeping it in a tank is a major no,no. Larger aquariums with open flow through systems will do this but home tanks have a risk of introducing pathogens into the ocean. In FL, confiscated, illegally collected animals are never returned.

    If Hachi is still very young, the shyness is likely age. If she/he is eating well and not showing signs of infection or self-mutilation, then more open activity will come with time. I have found that just sitting in front of the tank and letting them see you as often as possible without your hands in the tank seems to be the fastest way to get them to relax around humans but it takes time and patience and reaching an age where they are naturally more curious than concerned with being a snack for another animal.
     
  10. abdopus147

    abdopus147 Blue Ring Registered

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    Sorry I haven't been responding lately, I've been very busy.
    Now that this is a journal time to start from square one. A few years ago I was dragged along to go fishing with my father to a rocky, close by fishing spot. A few visits later my mother was standing on a rock when a piece of seaweed (she thought) was wrapped around her leg. When she looked down...... an octopus! She screamed and scared it away, I was unprepared so I couldn't catch it. That soon sparked my interest in octopus. I came back multiple times seeing maybe a few different species and even caught one (too big).
    On March 1, I got a shipment from saltwaterfish.com, a small octopus (another story), when I came to the same rocky spot to collect hermit crabs, two girls were playing with an......octopus! My dad asked for it and they gladly sad yes. I was exuberant! When I came home I separated it into a different temporary container and realized it was a bimaculoides, and it was missing the tips of two tentacles.When I acclimated it into its home it squirted at my hand! I soon released it and it happily went into its new home.
     
  11. abdopus147

    abdopus147 Blue Ring Registered

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    Hachi has been more aggressive and has chased after its food. Still nocturnal though :(. I'll try to get a picture or video.
     
  12. abdopus147

    abdopus147 Blue Ring Registered

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    Bimac troubles

    Hi, I have had I bimac for four months and recently it has been acting strange. Well, first of all, it never really showed interest in me(that doesn't really matter). Second, he doesn't hunt, though it's wild it seems unwilling to get out of his shell and chase a crab. Third, it inked yesterday(for no apparent reason, I wasn't even home) and since then it has been acting strange. It used to sit in its shell 24/7, only coming out when I'm gone to eat(and when the prey is in front of its face) , since the ink-bomb he has been out 24/7(acting very weird, sitting out in the open, but not getting close to me, my protein skimmer already picked it up. The water is fine I checked everything, but what could it be? Why is it so lazy? I recently installed a chiller, could that be it?
     
  13. CaptFish

    CaptFish Colossal Squid Staff Member Moderator

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    What was the temp before and after you added the chiller? When you chilled the tank how slowly did you let the temp change?
     
  14. abdopus147

    abdopus147 Blue Ring Registered

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    The temp was 72 and now is 65. I did it slowly about 2 degrees an hour, it has been on for 2-3 weeks.
    Thanks
     
  15. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    He was really young when you got him so hiding out is not odd from what I have seen of other species when they are very young. Hanging out on the wall may well be stress though and Diego did that for awhile when initially introduced. The inking without know cause is supect. Is there any chance you have hidden animals in the tank (mantis shrimp and some types or worms are often not detected for some time). With adults, most reef critters are not a problem but with the little ones they can be.

    If you should change temp again for that kind of change, it would be better to do it over a much longer period, 2-3 degrees a day rather than an hour.
     
  16. abdopus147

    abdopus147 Blue Ring Registered

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    NO chance at all. Everything in the tank is smaller than its mantle, no threat, and has been eaten by Hachi before. Hachi has been eating less too, he used to eat four crabs a day, but now he eats one every few days. I have taken everything out of the tank except a few clams. I have changed the water and checked the water parameters, everything was perfect. I noticed today that Hachi's tentacle tips were brown and curled up. I am worried and afraid it will die. What can I do? I think I should release Hachi, I know it was not the best to release a captive kept octopus, but I think it is the best and only choice.
     
  17. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    As they grow they require less food but I don't think Hachi is old enough to have started into that phase yet. Can you get a clear photograph? Are the arms curled in what might be called a cork screw (hanging down in spirals)? Description wise, neither brown arms (octopuses have 8 arms, squid and cuttlefish have 8 arms and two tentacles) nor curled arms (depending on the curl)are not alarming so a photograph would be most helpful. Is he still staying on the wall and staying away from the LR? Do/did you have any corals in the tank?
     
  18. abdopus147

    abdopus147 Blue Ring Registered

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    He is 10 inches long, is that big enough? He is eating alarmingly little. His arms are not cork screws, they are contracted in curls and do not hang. Only the tips are brown, the rest of him is a pale white, gray, and sometimes brown. I will try to get a photo. He is staying on the wall 24/7, so yes he is staying away from the live rock. I don't have and never had any corals in the tank.
     
  19. CaptFish

    CaptFish Colossal Squid Staff Member Moderator

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    Please do not do that. He could be contaminated with something foreign and potentially harmful to the natural environment, and we don't want start any ecological problem.
     
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  20. abdopus147

    abdopus147 Blue Ring Registered

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    OK, but the only thing I have put in the tank that isn't from this area is live rock.
     

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