I was feeding my goldfish the other day and i was done with their flakes. I dropped in two wafers for bottom feeders and my tadpoll and on the way down one of my fishes were trying to suck it in. It was crazy, it was about the size of trying to fit your fdist in your mouth. Put anyway the fish managed to get the wafer lodged in his mouth sideways. I thought it was funny at first, put then i realized it was actaully stuck there. my fish couldn't close his mouth. i was breathless i sat there watching this fish with his mouth pryed open for about 10 mins. i didn't know what to do. i just looked at him. Amazingly after like 12 mins, the fish got the waferdown his throat. but the point is, DO FISH REALLY NOT KNOW WHAT IS GOOD FOR THEM?? becuase i would think after it getting stuck my fish would try to spit it out and ignore it, but man, he just swallowed it. :?