Yesterday I fed my fish(a rock bass brim,like a bluegill/bass hybred,a native fish here in kentucky,aggressive little sucker),a minnow and he sucked up a mouthfull of minnow,gravel,and a marble!!!I waited for him to spit out the marble but he never did,the dummy swallowed it !I have thought about taking any gravel ect.,out of the tank,but I figured that in the wild they must get mouthfulls of gravel and know how to discern between food and rocks(he usually gets some gravel,but spits it out),but he definately swallowed the marble. Should I try to squeeze it out of him the way it came in?I'm sure it wont go through the other way