Hostile Zebra Danios?

[lukebailey]

I recently purchased a long-tailed zebra danio to go with my 6 other zebra danios. I realize that Danios love to chase one another, but ever since his introduction the rest of the zebras have been chasing him relentlessly. I cant tell if they are fin-nipping or not, but I feel for the poor guy as he cant do anything but flee.

Is this some initiation ritual, or will this continue? The poor fellow already looks a tad out of sorts.