Deformed Glofish

[Appledookiepie]

My grandpa has had this little glofish (I think she’s a danio?) alone in a little terrarium for 4 or so years and she’s kinda funny lookin.. she was just given to me about a week ago and I’ve never had glofish so I’m not sure if it’s normal for them to have deformities like this?
If it isn’t something my other fish could catch I was wondering if I’d be able to put her in my 20 gal or if it’d stress her out being around other fish since she’s been alone so long

 

[Jan Cavalieri]

The spine deformity is so severe it looks more like a Tetra than a Danio but I bet it's a danio. I'd try her in a tank with others and see how she does - if her deformity slows her down eating then the other fish may get to the food before she has a chance but if she swims normally she might enjoy the company (It will be a stress to begin with). Only you know how territorial and aggressive your other fish are - and you don't want her getting attacked - but if they are all the peaceful types then she should be OK (but even peaceful fish get territorial). Give it a try and if they pick on her too much then move her back to her other tank. Is her other tank big enough that you could try adding one more fish to it, rather than move her? Just to get her used to other fish? I have a Raspdora that has a similar spinal deformity but not quite as dramatic - she does swim a little slower but it's cute - her "school" always seem to wait for her to show up before moving on. They are a very tight knit group of fish.