Inverts like polyps and anemones have a two way digestive system, meaning that food enters and exits via the same orfice. My guess is that you will eventually see the digested food exit the mouth. As for the bulge on the side...I don't know. Got a pic? When you say it is getting bigger do you mean by the hour? or more like slightly bigger every day/week? If you mean day/week then it is probably forming a new polyp. If by the hour then...????
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