string hanging from fish????

[cbenn08]

Ok im very new to this hobby. Can someone tell me why sometimes my flame angel has a 2-3 inch string hanging from it. I have heard rumors that it could be overfeeding?? Not sure if its a bad thing or not

[Rea17]

Stringy poo can be indicative of internal parasites. The fish should be dewormed.

[cbenn08]

Is it common for one fish to have it but the others not to??

[SDguy]

It's not like an external parasite... it doesn't necessarily spread to other fish, but can.