Why Is My Cory Doing This?

[batamba]

I noticed this morning that one of my six albino cory cats is acting a bit nutty. Not the normal kind of nutty, either. She seems to like hovering right underneath the surface near the glass and...what looks like..."foraging" through the tiny row of bubbles gathered there from the filter. She'll suck them in and then expell them through her gills. She usually shoots off and does some other stuff after a minute, but always returns. I just fed them a shrimp pellet and she went and ravaged it with the others, they're still finishing it so I'll keep an eye on her and see if she returns to her bubbles afterward.

Morning tested - water params are perfect, temp is ideal. They have eco-complete substrate which they can easily forage in, the aquarium is moderately planted. No other tank inmates, and no signs of sickness. Just this one cory...being strange...

Could it be she has just developed a fascination with these bubbles? She's not gulping air, just the bubbles...swimming normally...looks healthy. I don't know. I have a 25% wc planned for today anyway.

And....it looks like she's at it again. Any thoughts?

 

[minxfishy]

Strange for corys too spent alot of time at the surface, sure they usually dive up and race around a bit, but if she is showing no signs of illness, swimming ok, eating and tank stats are fine, then it could be just a strange liking for the bubbles.