Zebra Danio Behavior

[wherestoad]

Hi all! So I have been out of town for a while and have only been to the house a few times during between trips. I’ve noticed my fish swimming and circling each other a lot. Specifically these two. I can’t tell if they are trying to breed or something or they are stressed. There are only 5 of them now because one died a few months ago. But that never seemed to bother them. My friend (who has been watching them) has noticed this behavior too and took a video a while ago. I’ll put screenshots of it below. And please excuse the dirty tank. I hadn’t had a chance to clean it out before leaving and my friend wouldn’t do it for me. I got home last night and will be able to clean it hopefully today or at latest tomorrow. I will be getting the water tested too since I haven’t done that in a few weeks either. My question:

Is this behavior normal? Breeding? Stress? What is this?

Also the screenshots are blurry because they are moving very very fast in circles with each other.

 

[Ichthys]

They look like they could be a pair spawning? If they are they’ll probably do it early in the morning, especially if there’s direct sunlight on the tank. They do this a few times, scattering a few eggs each time.

 

[Slaphppy7]

Post a vid of the behavior