I don't know if goldfish (or any species of fish) actually feals fear as we do (as in anticipation) but they certainly do have an immediate response to any kind of threat. They hide and know how to take cover from above attack from birds etc they also know when and how to hide in plants, branches, holes etc when being hunted by predatory fish too. So to answer your question. I would say goldfish are afraid of attack both from the air and in the water by any kind of predator that would like to eat them.
To list everything a creature is sensitive to would require an encyclopedia. Just remember that they are aquatic creatures so anything that damages the water or changes its composition can possibly kill fish.
YES.
yes, goldfish can get traumatized. if the are scared enough, they might get sick or even jump out of their tank if their isn't a lid on it.
A one human year old goldfish, is eighteen goldfish years old.
humans don't eat goldfish do they? wat.
the human give birth to young alive while the goldfish lay eggs.
larger goldfish can have grains of rice(cooked) -by racers
The answer is simple no golfish do not eat human food.
No! It is not physically or genetically possible.
Goldfish can eat some human foods. They can eat shrimp, crab, small pieces of orange, and softened small pieces of broccoli.
My Fantail Goldfish did that alot the first time I got him. I think it might be that they need to relax or they might be scared.
3 years. There are no "goldfish" years like there are dog years.
they are scared of us and some human beings are scared of them so the answer is yh they are nice to humans (theyre so cute too)
The thought that goldfish only have a memory of three seconds is false. Studies show that a goldfish has a memory of a few months. Goldfish have been taught to go through mazes or do tricks. The simplest way to prove that a goldfish has a memory longer than three seconds is to observe what they do right before they are fed. They tend to congregate at the surface near the human that feeds them. Goldfish clearly remember (have a memory) that seeing a human often leads to being fed. myth busted