Goldfish eating eating each other

Question
My largest goldfish is eating the fins of my other fish it has happened before and has killed a fish what is causing this and how do i stop it?

Answer
Hi Kath,
 There isn't much you can about that other than separate the fish.  Large fish often attack and eat small fish.  You can give the small ones a better chance by adding lots of structure (rock, wood, plants) to the tank so that they have a place to hide if need be.

-- Ron
  rcoleman@cichlidresearch.com
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