Neon Tetras

[PETsMARTchick]

I've noticed that at night, after I shut the light off, my neon tetras seem to have lost their color. Their red stripey thing is almost completely gone. But it's back in the morning. What's going on?

 

[Aqua_Princess64]

Sometimes that happens to my really bright guppies and platys. I'm not sure what it is, but I don't think it's harmful.

 

[spanair]

Maybe, just maybe stress could cause this as i've seen it happen on mines.

 

[MasterDrummer]

My neons do that to. Its nothing to worry about.

 

[diVer]

One of my otos does it too, at night the stripes towards the back of his body are almost gone but by morning they are back to being a dark black.

 

[Dorkhedeos]

thery are sleeping

 

[snowyangel]

My neons and black neons do it too but when my blacks do it, they're almost colourless, hardly recognizable. I think its a camoflauge thing, a security thing so predators don't find them so they blend in with the dark. Just a guess

 

[diVer]

My oto is definatly not sleeping when he loses his cover, I think that guy alone goes over every surface in my tank about 20 in one night.