What is/was growing on this tube?

[TacoBrew]

What is this stuff? I have seen stuff like it on a few bottles of beer before but never thought anything of it.

 

[ricewing]

Looks like grain

 

[travis0123]

Looks like they have antennas. How long has it been sitting there

 

[LabRatBrewer]

What did you pour into the tube? Maybe Weevils or some sort of pantry pest.

 

[Stauffbier]

Looks like little creatures of some kind for sure. What exactly is this tube, and what do you have in it? Are they growing on the outside or inside?

If you're seeing this in your bottles of beer I'd be concerned.

 

[Stauffbier]

What did you pour into the tube? Maybe Weevils or some sort of pantry pest.

I was also going to suggest weevils.

 

[LandoLincoln]

Kinda looks like the bugs that crop up in cereal that's been sitting around too long. Or the shed skins of the bugs from cereal.