They flick around the tank fast and move fast.
Yes, for they are both Fancy Goldfish (It's bad to keep Comets with Fancy varities because most likely the comet will become stressed and die).
No they do not, goldfish are egg laying fish only.
Dogs actually do not get stressed out but they can become jealous or hyper.
Yes, pH levels can affect goldfish growth. Goldfish tend to prefer a pH level between 6.5 and 8.0 for optimal growth. Fluctuations in pH levels outside this range can stress the fish and potentially stunt their growth. It is important to maintain stable and suitable pH levels in the aquarium to promote healthy growth in goldfish.
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.
It's VERY stressed. Try to put some Goldfish stress relief medicine in the water when you change it, or remove some
If it's just chasing it: This is a way that goldfish "play". They play rather agressively, but they don't really get hurt or stressed. If it's chasing AND pecking it: Then it's bullying. The victim(s) will seem stressed and hurt. If youhave bully fish put them in a different tank or return them to the pet store.
1983
goldfish need to lay eggs. Because if they don't no goldfish would be alive and would not be any more so they would become gone forever.
Probably, but usually the comet goldfish will get all the food and/or the other goldfish will become miserable. This has happened to me before and I do not recommend putting them in the same tanks. Try putting the fancy and comet godlfish seperate!
This info is from the internet: if you want to get some baby goldfish, the most fascinating way of obtaining them is of course to breed goldfish in your own aquarium or pond. A goldfish becomes sexually mature when it is around one year old, but will not reach their prime until two years later. It can be hard to distinguish a male goldfish from a female goldfish, but when they become mature the female will usually become a little plumper than the male. The male goldfish will develop small bumps on his head, and when the spawning period begins those bumps will be easier to notice since they will become white. Someone says they eat worms, but they don't so don't try it.
you become stressed