CAn i put barbs with my fantails or moores?

Barbs are tropical, and some, like tiger barbs, are very aggressive.

So, nope.

Ok thanks a lot.

After think about it, sould i put my barb in the tank so see how aggrressive he is ?

No. Barbs that are kept alone (ie - not with at least three others of their own kind) are very, very aggressive. Besides that, goldfish are cold water fish and barbs need tropical water. They arent compatible.

Ok thanks again.

Green Barbs are not aggressive. But hard to find. I kept them with betta and they where just fine.