They could be mating or just trying to play with eachother.
The white dots mean the males are ready to spawn. The spawning procedure of goldfish is to chase one another.
The other goldfish might be bullying - please remove the black one before it stresses too much and dies.
Goldfish are peacefull fish and do not normally fight with one another.
They will chase eachother's tails.
My two goldfish were in a tanktogether and mysteriously one died.i blame the other one named nemo.it killed dorie
Yes. My red ear slider turtles love to chase, catch and eat goldfish.
I have 8 goldfish and I believe you should not have a mix of those two fish breeds because they like different water temps., food, and other things. I believe you shouldn't get another goldfish.
no they wont fight its actually a good idea to get another fish fast as ur fish will feel ill coz of the sudden absence of another.. goldfish are not known for eating one another.no.
No. It is a territorial thing.
the goldfish that is being chased might be a female goldfish where as the others are male goldfish, so the female one gets battered around the tank and the fins and tail might shred it is a good idea to separate the single fish so it wont be attacked. i know this cause my Goldfish do the same XD Look for white dots on the cheek of fish that r chasing the other one. if it does have white dots its a Male hope that helped :)
Some fish are aggressive when it comes to food. The fish may simply not have enough space, the fish they are chasing may be pregnant, and the others are chasing it in order to get her to "drop" (have the fish babies) or the fish they are chasing may be sick and dieing.
Take your goldfish. They will travel.