Cardinal tetra with curved spine!!??

[Renzo77]

One of my cardinal tetras i've noticed has a curved spine and I've only just noticed. It was a bit subtle and i was only able to notice it after a closer look so i don't know when this started.

20 gallon tank

Ammonia - 0.2ppm
Nitrites - 0ppm
Nitrates - 40ppm

Tank mates: Amano shrimp

It's still eating and is still quite active. I heard it could be a disease or some kind of genetic problem
Should I quarantine it? euthanise it?
I want euthanisation to be the very last option

 

[FishGuest5123]

Can be a sign of TB (Tuberculoses) too.

If a fish has a bent or curved spine, it is most likely infected with a Gram-positive mycobacteria (Mycobacterium marinum or M. fortuitum). This is commonly referred to as fish tuberculosis, piscine tuberculosis, acid-fast disease or granuloma disease. From Pet Central.

 

[Colin_T]

post a video and clear picture of the fish when it isn't swimming.

 

[Scott1973]

Mine are showing the same affects my others seem fine im loosing fish daily now