Weird creature found in filtermaterial

[Thomas V.]

Hello, not sure where i should post this.

I'm looking for an ID on some sort of worm i found in my filter material.




I've got no clue if they are harmful to my fish or not.

No new fish/plants were introduced for at least a year, except for a couple of mussels last summer. (personally i think that's where those worms come from)
I don't give my fish live food either.

Since the picture isn't that clear, the worms are bright red, very thin and can get quite long, i found some of about 10cm.
The filter material (white stuff in the picture) is full of them.


So if anyone knows what they are and if they pose a threat to my fish or not, please do share the info!

Thanks in advace,
Thomas

 

[ascarbo27]

are they blood worms?

 

[fibbingbear]

Looks like it's blood worms.

 

[Thomas V.]

i have no idea

i do give my fish frozen blood worms now and then.
is it possible they still live?

 

[ascarbo27]

they are alive?

 

[Thomas V.]

yes and clearly reproducing

 

[ascarbo27]

im not sure if it is bad or not, id change the filter, maybe some eggs got released into the filter or something,

 

[Redearsunfish]

Blood worms aren't really worms, but more insect larva in form. Not sure what those are.

 

[petspoiler]

looks like a live tubifex worm. they can get that long. (but I'm not 100% positive of ID), they are red when living but brown when bought as FD food.

 

[lp85253]

I wouldn't stress it too much,, looks more like food than a problem .. then again I don't have to deal with it you do..