What is this?

[ChicagoReefMan]

http://i128.photobucket.com/albums/p162/brianbaker21/DSCN0048.jpg

Please help both of my fish have this? What should I do?

[kiknchikn]

I've seen that before but can't remember what it was, so I'm going to tag along with this thread and give you a free bump while I'm at it.

[Hattie B]

Is the white flim attached to your fish?

[ChicagoReefMan]

yes it is

[Hattie B]

Is it possibily Brook?

Wet Web Media, has a lot of info and pics about brook. As well as a sticky here.

Go check those out to see exactly if that is it?

This looks like a string to me, brook is more a white film. But since you can actually observe the fish, I would start there.