Does my Clown have a parasite?

[chadfish]

Cousin Derp seems erratic and distressed. There is a long white “poop” hanging out. Tangerine seems to be trying to help.
Is this a parasite?

 

[chadfish]

He has calmed down now that he passed it

 

[ReeferSutherland]

I have read that long white stringy poops could be a sign of internal parasites. Is that correct @Humblefish ?

 

[Humblefish]

I have read that long white stringy poops could be a sign of internal parasites. Is that correct @Humblefish ?

Sometimes. The problem is white stringy poop can also just be a sign of intestinal irritation. So, it's best to get a total picture of the situation by looking for additional symptoms:

1. Intestinal worms
Symptoms: White stringy feces, pinched stomach, fish has faded coloration, fish eats voraciously but still seems to be losing weight.
Treatment of choice: Praziquantel
Alternative treatments: Fenbendazole, Levamisole, Piperazine

2. Internal parasites/flagellates
Symptoms: White stringy feces, pinched stomach, fish has faded coloration, fish eats voraciously but still seems to be losing weight. Flagellates are more virulent than worms, and thus can kill faster.
Treatment of choice: Metronidazole
Alternative treatments: Albendazole, Flubendazole and Mebendazole all show promise. (More treatment options for internal parasites)