We thought these might work as a filter, but I like your velcro idea :)

This from my PhD work -- I wish I could follow up on this :) We did do TEM of the filaments. I should have some pictures

I don't think so. These are some kind of cuticular filaments. We've never seen anything like this in other nematodes and have no idea what they do.

This is my personal favorite -- the nematode Pristionchus borbonicus, which can be found in figs