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Goldfish fighting

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  • Regular Member

Hi there,


I have had a calico fantail on it’s own for 6 weeks in a 32 gallon tank. He is vert small. 

today I added a ryukin which is about double the size of the fantail. The fantail has been chasing the ryukin non stop since I added him to the tank. The ryukin does not seem stressed but I think the fantail is sometimes nipping. 

im not sure why a smaller fish is attacking the bigger one. I turned off the lights and moved some decorations. Nothing is helping. 

will this behaviour stop over the coming days?


any advice would be great. 

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