Probably because its water is putrid. The basic requirement of all fish is pure, clean water. In order to provide this there are a couple of basic rules that every successfull aquarist lives by. "1 inch of fish needs a minimum of 1 gallon of water. All fish tanks need a cycled filter. All fish tanks need at least 50% water changed weekly. Follow those rules and your fish will swim. My immediate advice is CHANGE THE WATER NOW!!
Well goldfish move their fins of course.
Take your goldfish. They will travel.
it doesnt go by colors.
it really doesnt matter as long as you try to feed the goldfish around the same time every day.
Just room temp should be fine goldfish are tough so it doesnt matter to much
that question doesnt make sense if it means how did OUR goldfish die... i dunno. it was still young, like 3, but it just died one day. ><
if it is a fixed pulley, itself doesnt move. If it is a rotating pulley, its joint probably doesnt move.
Male fish have claspers on their lower belly, so if the fish doesnt have these claspers, then it's a female. I dont know if it's the same with goldfish, but since they're fish, it probably is.
Sometimes they do and at others they are pretty well comatose.
There are both saltwater and fresh water goldfish so it doesnt really matter which. Saltwater ones can't live in fresh water and vice versa.
Goldfish are naturally attracted to rotting fins, so if your goldfish has rotting fins get a cure for it or change your water. Or, in the other case, if that goldfish is bullying its tankmate, move the bully or victim to another tank or return the bully to the pet store.
Because that's how it breaths. Are you really that dumb?