Most fish have long feces because gravitational force is lessened in water, thus the feces strand takes longer to break from it's own weight. Though I must say, what an interesting question! :D
No need to worry. All fish of the family Poecilidae have long feces. You should only worry if it's white.
It is poo and will drop off eventually.
yes
all you really have to do is put a boy and a girl in a tank together and before you know it you have mini mollies and when its does happen take out the bigger fish because they will eat the little fish
feces. In their feces is fish bones and stuff.
By performing an experiment
Yes fish poop.
They will co-exist but Angel fish like their water soft, acid and around 80F and Mollys prefer their water hard, alkaline and about 75F.
The correct wording is why do freshwater fish eat feces. The answer is that they do not absorb nutrients well so they have to digest the food, now feces, twice. Zaragotha (Zara)
As Mollies are tropical fish, they need regulated heat and good filtration. My Mollies have been known to dive.
No, they are different types of fish, but since they are both livebeares, they can interbreed.
It will either flee or hide. Probably it will do both.
you cant. you have to remove the fish before it does further damage to other fish.