Question: Wavy Tails?

I have a pair of axies that are about 5 or 6 months old and I have noticed that their tails will occasionally crimp up and appear wavy. This happens most often after a water change. My tank is mid-cycle, so I scoop the babies out with a tupperware container and feed them breakfast in their containers while I do the water change. While they're in the tupperware and eating, their tails are straight and normal-looking, but when i put them back into their tanks, the wavy tails make their appearance. It isn't a temperature difference issue as I am very careful to make sure that the new water is the same temp. as the old water.

Currently, it is about an hour after the water change and the melanoid's tail looks straight again, but the leucistic's is still pretty wavy. Is the wavy tail a stress thing, or maybe a response to an emotion, excitement or nervousness, perhaps? I haven't noticed any forward gills or bent ends of tails, just the waviness.

Thanks!

I think it's just what they do sometimes.. Mine never do

I do notice that they are significantly more active when the tails are wavy. Maybe the waves just mean I'M AWAKE!

my leucistic does it when i feed him/her. i wouldnt worry about it to much, as long as their tails are not curled so that the axolotls body and tail make a U. if that is the case then i would worry!

Lol found this post when I searched for wavy tails...yeah mine does that too, she's about a year old, now I just changed the water and fed her AND its night and she always acts like an axie pumped with adrenaline at night, so yeah I would say activity does it..I see it more with that than food or changes

it might be because they've been cold shocked after being put back in diff water? my goldfish swim backwards when i change their water, but they soon get used to it and stop. if their being 'hyper', its prob because their feeling refreshed. it's like after someone has a shower. the feel fresh and more energetic. thats prob the deal for your axie. just make sure there tails aren't kind of bent in half. that means their stressed