they are probably spawning.
check out this sight it helped me:
http://www.aquariumfish.net/catalog_pages/goldfish_and_koi/breeding_goldfish.htm
Goldfish can not be pregnant. They lay eggs (spawn) in Springtime when the water temperature starts to warm up towards 70F.
You should not put a male betta with goldfish's.They are aggressive and will fight with goldfish's goldfish give off ammonia and will kill the Betta's.
Normally goldfish are peaceful and calm.But incase your goldfish is doing so then its better to separate the new goldfish.
no let it doing
Depending on what your sick goldfish has, it will either be specific to that fish, which you should place in a separate tank to treat, or it's something that will spread to other fish in your tank, in which case you will need to treat them all.
Goldfish and cichlids should not be kept together in the same tank. Goldfish prefer cooler water temperatures and produce a lot of waste, while cichlids prefer warmer water and are more aggressive. This can lead to stress and potential harm to both species if kept together. It is best to keep them in separate tanks to ensure their well-being.
As soon as the doe gets pregnant. Does get very very defensive and "moody" when pregnant and could become aggressive towards and dangerous to other does.
It is generally not recommended to keep the male and female betta together after mating, as the male may become aggressive towards the female. It is best to separate them to avoid potential harm to the female.
Usually it's because the male wants the breed with the female so he chases the female around the tank! So unless you want little fry (baby goldfish) in your tank you should separate them!
No, a goldfish will not kill a betta but they should NOTbe housed together. First of all, bettas are tropical fish, meaning they need temperatures of 75-85 F while goldfish are cold water fish and need much lower temperatures. Also, bettas are usually quite aggressive and territorial so I would not risk housing him with a goldfish.
Your best bet would be to separate them. They may also just be playing with each other.
i love tanner