Acan had white string coming off one head

[Molly1414]

I have a three head Acan that has been doing well. It puts out feeders at night and I have been feeding it a few times a week. I noticed the other day the smallest head had a clear whitish string hanging off it. It's gone now but was wondering what that was and if it's a problem. Thanks

 

[agranoff]

Sweeper tentacles maybe? Get a photo of it. Likely not an issue.