back in the late 80's i had a 75 gallon fish tank that i kept a largemouth bass in from when it was about 7" long. it grew over the years, to be about 5 lbs before it died. my (then) 3 yr old son kept taking socks from the hamper and throwing them into the fish tank. at one point i remember a buddy coming over with a pickerel that was nearly twice his size. he wanted to put it in the tank. i was afraid the pickerel would kill the bass. he swore he would take them out if the pickerel went after the bass. i needn't have worried. the bass rammed the pickerel repeatedly until it went belly up. the pickerel never tried to fight back