What kind of worms are these in my acros?

[Leopardshark]

Hello all, I just received some acros and I saw these white fast moving worms in the bags.
They swim fast, they are white, very small (1-2 milimiters or 1/20 of an inch)
I took some pictures while in the bag, sorry for the quality and one picture of one worm that I took out, which turned yellow when it dried.
Please let me know your veredict!
I will treat with Coral Dip rx immediately.
Regards

 

[swk]

I don't know about anyone else, but I can't tell much from these pics. Sorry.