Little strands sticking up out of sand bed?

[k log(omega)]

I siphoned out a thin top layer of my sand to remove a couple small patches of dinos (whole other story) and saw these. Looks almost like grass growing out of the sand. Sorry for blurry pic quality. Anyone know what this is?

 

[EeyoreIsMySpiritAnimal]

Do they retract when touched? Do they catch food particles? Looks like some sort of algae but need clearer pics and a better description to really identify.

 

[k log(omega)]

Do they retract when touched? Do they catch food particles? Looks like some sort of algae but need clearer pics and a better description to really identify.

they don’t really seem to retract, not sure if they’re catching particles, they sway a little in the current (not firm/hard like vermatid snails or tube worms), and they seem to have a slight green tint up close

 

[AKReefing]

Just tubes. Don't worry about them.

 

[k log(omega)]

Just tubes. Don't worry about them.

thanks!

 

[X-37B]

Hard to tell. Can you get a closeup of one?
It looks like how my calceours algae spreads. Starts off small and pops up somewhere else and grows to this.
May not be though.
Bottom left.

 

[AustinBabler]

I had that when I went through a cyano bloom. They go away in a few days

 

[k log(omega)]

Hard to tell. Can you get a closeup of one?
It looks like how my calceours algae spreads. Starts off small and pops up somewhere else and grows to this.
May not be though.
Bottom left.

i do have some small halmedia strands on my rocks, that would be cool if it started spreading that much like that lol