Bluegill In My Tank?

[az9]

Hello! My little sister caught a bluegill out of our pond and put it in a jar a couple weeks ago and i thought it would just die in the jar but it didn't its still alive out in the cold jar. Can I put it in my 30 gallon? I have 6 albino corys, 1 female German blue ram that i will soon be getting a male for and 3 gouramis. The bluegill is only about 2 inches long. I won't be keeping it in there. Just until it out grows it.

Thanks!

 

[DerpPH]

Blue gill will harass your other fish.
 
There is a big chance it will also eat the other fish

 

[az9]

Even when it's only 2 inches? So im geussing it would be best to keep it out then?