• Welcome to TONMO, the premier cephalopod interest community. Founded in 2000, we have built a large community of experts, hobbyists and enthusiasts, some of whom come together when we host our biennial conference. To join in on the fun, sign up - it's free! You can also become a Supporter for just $50/year to remove all ads and gain access to our Supporters forum. Follow us on Twitter and Facebook for more cephy goodness.

[Octopus]: Onn - O. briareus

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,949
We still pretty much only see arms taking food from Onn (she eats well but will not be coaxed out of her rock to retrieve dead food, live she hunts at night) but when I cleaned her tank today in full daylight, she "defended" her den by showing her arms if I came near her rock. She did not come out to the daylight side but she did appear in the back enough so that I could see her mantle and eyes.

I use "den defense" as a statement of being fully acclimated to aquarium life and hope this will be the beginning of more sightings.
 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,949
I'm guessing Onn is about 3 months old now. She is still rarely seen but eats daily with some encouragement (primarily waking her up, she is all about the food once she is awake). Saturday night we saw her actually out on the glass (a first since acclimation). Once she noticed us she went back to the LR but stayed visible. Tonight it took awhile to wake her up for supper but once she had her shrimp in arm she stuck her eyes and mantle out of the rock to look at me and did not go back in for a few minutes (may have stayed longer but we let the dogs in to eat and they don't walk slowly to their food :roll:).
 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,949
Yesterday I wiggled her shrimp around in the hole in one of the rock pockets to wake her up but did not see her for longer than it normally takes her to wake up. I happened to look down and notice that she was sitting in full view in an opening between the rocks looking at me. Tonight she came out of the same opening so I am hoping this means she is finally out growing the internal rock cavity and that she is gaining confidence in the outer world.
 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,949
Move to Big Boy Tank After 3 months Onn has pretty much outgrown his den that is internal to the rock in his 40 gallon tank. The tank would probably be OK for another month with different live rock but I have his final tank ready so I moved him today. Unfortunately, I took pictures with too much outside lighting so most have sever reflection. Onn's new home.................................... ............. Exploring new tank with nursery tank in background Exploring He (I think I saw a channel on the third right arm and he was keeping the tip curled but often other arms were curled as well) spent the day exploring and stayed out all day and into the early evening. He was a little difficult to feed but eventually took his supper. During his explorations he crossed over several times but stayed primarily on the right until supper time and then decided to hide on the left. I don't think he has found a satisfactory den yet. These rocks do not have internal cavities like in his original tank but there should be an appropriate set of choices.
 

Attachments

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,949
Onn is starting to almost interact. He is out more and more during daylight (somewhere around 5:00 to 7:00) and occasionally in the middle of the day if he notices someone walking around. He is becoming less grabby and more curious but I have not attempted to pet his mantle when he holds on to my fingers. I will try to get some photos this week. Long rather thin arms and still a small mantle but appears health. He has appeared to take an interest in Margay over the last couple of months but lately, I have not seen them wall dancing together.
 

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,949
Nine Month Update

I have been trying to capture a photo of Onn to show the length of his arms but he won't hold still for the camera when he is spread out! Here are a couple of my attempts but they don't provide the information I was trying to capture. Each half of the tank is about 22" long and about 24" tall (below the hood about 23" to the water line). The connecting tubes are 4" long and we feel certain that he would not have to do much stretching to touch both ends while sitting in the tube if it ever occurred to him to try. His mantle remains on the small side but, oddly I have noticed it growing in the last month or so. I would expect this in a 10 month old female (he is somewhere between 10 and 11 months old having arrived quite young 9 months ago today). He has started to lose muscle in his arms but has only slowed slightly in his food intake. We did notice yesterday that he drilled a crab claw and liquified the contents instead of his usual method of breaking it at the joints. I have offered him skinned fresh salmon and small scallops this month and he ate both where he has occasionally rejected his normal shrimp so I will buy more of the softer food.

I did manage to get a night, red light video that shows the grace of these animals. The speed is actual.
 

Attachments

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,949
Another photo attempt at trying to show the length of Onn's arms. I tried to make a "flipbook" but the multi-select did not retain the order and I have yet to figure out a way to order/reorder the images in an attachment collection without attaching individually (yes, you can select and attach multiples now :biggrin2:)
 

Attachments

Last edited:

DWhatley

Kraken
Staff member
Moderator
Joined
Sep 4, 2006
Messages
20,949
Since we lost Margay, Onn has been more interactive. I am not sure if this is a function of age, if we paid less attention because Margay was diurnal and more interactive or if he is "lonely" without another animal to dance with at night. I took several videos tonight but most are overly long. This was the first of the series and Onn was already in the front "play corner". Over an hour period, Onn will come and interact for 3-4 minutes at a time, slide to the the "dark side", dance a bit on the glass and come back to the play corner if I place my hand back in the tank (when he goes to the other side of his den, I remove my hand). He has started to accept a light mantle "rub" and is putting a slight amount of pressure into my hand with his arms when he laces them into my fingers (I have come to believe this is equivalent of scratching and see it often in older animals). He still grabs a little but does not flee when he can't run away with my hand. I have seen no beak poking out,a sign I take for considering a bite and will end play if I see it.

 

Latest Posts

Forum statistics

Threads
20,753
Messages
206,499
Members
8,444
Latest member
turtledragon

Monty Awards

TONMOCON IV (2011): Terri
TONMOCON V (2013): Jean
TONMOCON VI (2015): Taollan
TONMOCON VII (2018): ekocak


Top