Dark Fishing Spider Advice Needed;

EightBitSkunk

Arachnopeon
Joined
Nov 9, 2024
Messages
1
I've had a dark fishing spider, dolomedes tenebrosus, for about a year. Her name is Archimedes.

I caught her inside my home last summer. She has molted three or four times, and this last one about two months ago. I believe she is fully sexually mature; She spun an egg sac about four weeks ago. I'm sure it's not fertile, she has had no outside contact, though I do wish to find her a mate of her species. (Additionally; how long will she live after her last molt? Sources vary, the most common one I'm reading is about a year. Is that correct?)

However the problem arises now that I am getting worried about food. I need to feed her. She is guarding the sac and I have let her alone for the most part. However she is getting terribly thin. She refuses any feed I give her- Big or small. I want to know if it is in her best interest to take the egg sac away and see if she will eat when it is gone? I doubt it, but I don't want to unnecessarily stress her out by taking it away.

Here's some photos. The one where she is laid out is the oldest, but it along with the one of her on the stone shows what her abdomen has been at usually, and here is what it is at now; The photo with her upside down and all the ones with the green+red veined leaves, were taken today.

If anyone has kept these before, can you let me know if she is critically thin? I generally keep her well fed but she is currently refusing food. It has been since Oct 13 since she last ate. I went on a camping trip that weekend and fed her a biiiig cricket, and when I came back she'd spun an egg sac. She's refused food since and I am getting terribly worried about the increasing tapering point of her back end. She is posturing by keeping her sac kept curled up between her front and her back, so her abdomen has been kept at a strange angle, which I think makes it look smaller than it normally is too, but I am also worried for her.

I also wish to know if it is ethical to release her after keeping her for so long. Originally I wanted to just study her, but she's too fascinating, I ended up keeping her. However with the knowledge that she is sexually mature now, is it more ethical to release her in the countryside where she probably had been before ending up in my house? So she can find a mate? Or will she have forgotten how to survive out there, is it better for her to keep her in her ten gallon?

Setup; Ten gallon tank with mesh+glass lid, humidity meter, (She gets misted if it dips below sixty five percent) wood logs and stones, coconut substrate mixed with sand + dirt + a bunch of springtails, a dish for water with climb-up things in case of falling in. photo_2024-11-09_00-35-56 (2).jpg photo_2024-11-09_00-35-56.jpg photo_2024-11-09_00-44-09.jpg photo_2024-11-09_01-03-30.jpg photo_2024-11-09_01-03-28.jpg photo_2024-11-09_01-03-25.jpg
 

TheraMygale

Accipitridae
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Joined
Mar 20, 2024
Messages
848
Remove the sac. Why no one told you this yet baffles me.

If you want to release its 100% fine: find a place perfectly suited.

I dont know how winter is looking for you though.

Once sac is removed she will get back to her normal. Or die. If that was all the energy she had.

Once you have kept a species captive, throw all that ethical crap away. Its not a unicorn.

Release it or don’t. Its not endangered. You have been keeping it in a cage. Her maturity changes nothing.

Lets push this forward: what is ethical? We keep tarantulas in cages for years. Some who are on the verge of extinction. Their lives matter as much as the blue whale.

We do it because we can. Don’t overthink it.
 

CRX

Arachnoprince
Old Timer
Joined
Dec 28, 2008
Messages
1,076
Remove the sac. Why no one told you this yet baffles me.

If you want to release its 100% fine: find a place perfectly suited.

I dont know how winter is looking for you though.

Once sac is removed she will get back to her normal. Or die. If that was all the energy she had.

Once you have kept a species captive, throw all that ethical crap away. Its not a unicorn.

Release it or don’t. Its not endangered. You have been keeping it in a cage. Her maturity changes nothing.

Lets push this forward: what is ethical? We keep tarantulas in cages for years. Some who are on the verge of extinction. Their lives matter as much as the blue whale.

We do it because we can. Don’t overthink it.
I would be fine with ditching the whole concept of keeping pets, except that would leave millions of animals helpless with no owners. Its really just a messed up situation when it comes to pets.
 

Brewser

AraneaeRebel
Arachnosupporter
Joined
Nov 28, 2023
Messages
1,031
Woulda, Coulda, Shoulda ?
Seasonal Change is Here Now.
Do what You think is 'Right' for Her & You.
Best Wishes to U both.
Beautiful Specimen btw. :)
 
Last edited:

Ramen

Arachnopeon
Active Member
Joined
Oct 10, 2024
Messages
46
Beautiful spider. In my opinion, pull the sac and give her a cricket.

I'd keep her, but if you feel the need to release her, that's cool too.
 

TheraMygale

Accipitridae
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Mar 20, 2024
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848
I don’t know if the pictures were there originaly, but wow. Very beautiful spider and informative. I like to see these and how people keep them.

personaly, i would keep her at this point.

i keep looking for them. Would love to photograph some. So far no luck, next year maybe. I know where to look. Just don’t have as much time as i used to.

hopefully i will get to observe one as pretty as yours. So big too!!!

my favorite shot of yours: the one where she is resting on the peice of wood. Its a fantastic shot seeing her in this natural pose. Looks like a happy spider.
 

darkness975

Latrodectus
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Aug 31, 2012
Messages
6,008
Keep the spider.

It has not had a chance to properly adapt to the seasonal changes so throwing it outside now is an almost certain death.
 
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