Curved back?

[Lilgeck]

does anyone know why her back is curving up like this?? It wasn’t like that last night, I just woke up and checked her and this is how she looked. I’m very concerned because I thought I read something about that on here before.

 

[wolfen]

please check your water parameters ph/ammonia/nitrite/nitrate/temperature, looking at his/her gills and dorsal fin along with the arched back it looks like it is stressed. also make sure the water is oxygenated with a air-stone.