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There are so very many species of tropical fish. Some will live happily in groups (shoals/schools) of their own kind and others are happy with almost any species. There are the carnivores who will eat anything small enough to swallow and of course there are those species who do not like to have any company at all. So the answer is. If you choose the right species to mix together there will be no fighting or bullying but if you choose the wrong ones, you could have mayhem in your tank.

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15y ago

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