What is this parasite? How to get rid of it?

The good news is, I think the ich is gone! I'm in the last days of treatment (3 days after the last white spot disappears, right?) but one of the fry died. I was examining him and what I thought was a wound is WORMS! Truly disgusting. I'm sure the others have them too, and I want to treat them as soon as the ich session is over. Can anyone tell me what kind of worm this probably is? Is there a standard way of treating it? Do you regualrly worm your fish like, say, horses? Water is slightly brackish.

Where were the worms on the fish, what colour how big can you describe them.

Sorry, I thought I had added a picture with "attach file". What did I do wrong? I'll try again.
The fish is 2 cm long.

Poor little thing, red worms are they coming out of the anus.

THE OTHERS PROBABLY HAVE THEM TOO! HOW CAN I GET RID OF THEM? ?

Most people don't have any luck getting rid of these theyare tricky., whats your location.
http/www.skepticalaquarist.com/docs/health/nematodes.shtml

Thank you, Wilder. I'm going to stop feeding them live food (like daphnia) for a while, break the worm life cycle; get them on commercial food. They've only started to accept it; reluctantly. They're lively, so maybe they're just more resistant. But it would be awful if they didn't eat and then got weak and sick. They're wild-caught, some kind of goby (or gobies) just coming back from the ocean to their fresh water adult stage. (I find the whole thing very interesting.) And since they seem to sift gravel, I imagine they've evolved to handle a certain amount of parasite load. Anyway, thanks for the link.

Good luck.