looks like tetras of some sort. tiger barbs are notoriously aggressive so you have to be careful that you have enough space for a school of them so they will stay to themselves. this doesn't always work, however, tiger barbs are fin biters so they have aggressive tendencies no matter what. you could go with a less aggressive barb, though, like cherry barbs. I've never had barbs, though, so I don't have personal experience but every situation is different I would just say be very careful and have a backup plan.