hold on, i dont really get this. did you catch that lmb and then try to put him in your tank with that now dead bluegill as well? it is sometimes pretty difficult to acclimate big fish to tanks.
I imagine your tank wasn't cycled and adding that many fish, especially large fish, caused an ammonia/nitrate spike.
I'd wait until your tank is cycled before adding any fish and then add them slowly.
Also, if you want to legally obtain those fish, look for a hatchery that you can purchase them from. Otherwise I'd contact jonahsaquarium.com and obtain fish through them.
