It won't harm them, but they typically don't eat it. Sometimes they might confuse it for food, but they normally spit it out immediately.
Swim, Eat, Swim, Eat, Poop, Swim, Eat,Poop....
If you mean will a goldfish eat its own fry or eggs then the answer is yes.
I would imagine so, Would you eat your own poop?
no you did
No.
Goldfish excrete, yes.
No, the goldfish fry are on their own on hatching.
yes
sometimes
YES.
The long strand that is coming from your goldfish is poop.
no they do not eat their poop they eat the mud so when they poop the mud i gets more nutrients when the worm digests the mud it becomes fertilizer or compost for plants. hope this helps :)