Are Danios Aggressive?

[kazzzagreen]

I have 6 leopard danios in 1 coldwater tank, 3 leopards in another and 3 pearls in my tropical tank. None of them cause any harm to the other fish in the tanks.

In my experience zebras are the most aggressive and even worse when they are not kept in a big enough group. Keep 1 or 2 zebras and you're asking for trouble.