Because that's how it breaths. Are you really that dumb?
It depends, if your goldfish are smaller than your algae eater, and big enough to fit in it's mouth, then very much so. If the goldfish are small, but too big to fit into your algae eater's mouth, then he might just injure them. But your algae eater shouldn't be so small that your goldfish could eat it. The rule with fish that I always go by is, if it can fit into it's mouth, it will be eaten.
Axolotls will eat anything meatwise they can grab so a goldfish would be fair game.
Goldfish have pharyngeal teeth which are near the back of the throat, so they may chew their food in some way, but not the same way that humans or animals with normal teeth would
Healthy goldfish will always be hungry and eager for food.Yes all fish will stop eating when they have had enough. It is impossible to overfeed goldfish because they do not over eat. It is not hard to put too much food in their tank or pond because they do not eat very much. If you do this the fish will not eat it all so the left over food will go rotten and poison the water.
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.
So you can move your mouth and thus eat.
If they are not friendly goldfish species than they will but in general they don't. If they do than you probably don't feed them enough but that is really unlikely.yes they do. Its all a matter of size.
Yes the mother goldfish will eat the fry-and so will the father, that's why it is a good idea to move the parents into a sepperate tank after they have bred if you want the babies to live.
Just room temp should be fine goldfish are tough so it doesnt matter to much
Bettas are much easier to keep than goldfish because they are not quite as fussy as goldfish when it comes to the Oxygen content of their water.
Goldfish have been known to eat their own young so moving the mother goldfish out of the tank and into another is probably a good idea. You do not need to do this if the eggs have not been fertilized by a male goldfish. In that case, it is perfectly fine to leave the eggs with the mother as she will greatly enjoy devouring them.
Yes. goldfish breathe water so if a goldfish is out of water it cant breathe so it will suffocate