A goldfish's body is made of scales, fins, organs, and bones covered by a layer of skin.
Yes
they often fall or have a disturbing chase
Predatory fish and birds will kill heaps in the wild but most goldfish are killed by people who don't look after them properly.
go to the vet ASAP
They've not got muscles to keep them up straight. Its only the water which is holding them up and making them move.
to cure these problems, you should go to your local pet shop, tell them about the problem and the will give you special treatment
Goldfish are cold water fish while the others are tropical, so no they won't as depending on what type of tank you put them in, one group will die.
body-made
Body armor is made of Kevlar.
No, body cells are made by mitosis
body fat is made out of long-chaim fatty acids.
Your body is made of molecules which are made of atoms. All atoms have electrons.