Odd Cory behaviour

[Kezzab]

One of my peppered cories has the habit of swimming upside down at the surface, using the water surface tension to hold him in place. He uses it as a feeding technique. He also hangs limp and apparently dead at the surface but is actually fine, he just tootles off and does his thing when disturbed.

Anyone else had this?

 

[sciencefiction]

Do you have a video perhaps?

 

[Kezzab]

 

[Kezzab]

It's weird. If he's not actively swimming down he seems to float to the surface. To stay down he's wedging himself. None of the others do this.

 

[sciencefiction]

It doesn't look normal to me Kezzab. It could be a range of issues. We talked about fish diseases causing buoyancy issues recently on the below thread. In my opinion and experience it is either water quality triggered or parasites/protozoa, or both.

The thread is a bit long but have a look.

https://www.ukaps.org/forum/threads/still-losing-fish-is-it-co2.57056/page-2

 

[zozo]

It could be a swin bladder disorder...
https://www.wideopenpets.com/learning-5-ws-swim-bladder-disease-fish/