So, yes. The answer, to all you TILAPIA EAT POOP Googlers, is “sometimes.” Which maybe should turn me off to eating tilappia, but the more I researched, the more I thought about other things that are fed on disgusting things (like free-range chickens, which eat the bugs out of cow poop; or mushrooms, which feed off decay; or really any kind of food that takes organic fertilizer…including the tomatoes and greenbeans and carrots I myself grew last summer, which were fertilized with composted manure from a nearby horse farm…).