Do cockroaches have hunting behavior?

Sorry I recorded it on my phone which I scrambled to grab when I pulled up the egg flat and saw what was happening but here's the YouTube link

 
I've dropped crickets in with my Periplaneta americana and they definitely chased, mobbed, killed, and ate them. At least some species have no problem hunting down prey.

 
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I've got a video I'll post eventually of my orange head roaches chasing after isopods and banana roaches. It is bizarre to see, but they are pretty efficient at catching other bugs. The banana roaches that escaped for a while were not consumed, I think they start to smell like the orange head colony.

Actually, I think this thread might have been the reason I got the orange heads. They are fun roaches.

 
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The orange head's predatory actions could be partially due to moisture level in the tank, though I doubt it. 
Orange Head roaches also enjoy meat much more than other species do so that could factor into it too.
overall I think most species of roach would eat a cricket simply because they are given the chance to do so. I don't think that they would go out of their way completely to find and eat other inverts if they were in the wild.

 
Two times in the last four hours we have caught juvenile cockroaches, hunting and eating, Nate's that go around foul water from plants.

 
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