Here is a picture of a bluegill from my little pond. My guess is it is about two years old and I believe it is a male (threw him back to get bigger).

My son and I fished out about a dozen females that appear to have swollen abdomens (thought they were carrying eggs). What we found was their stomachs were full of pellets, bugs, and some kind of black wormy looking stuff that looks like roots of a plant. Not sure what that is. We have a lot of plants in the pond; something I call "fox tail" (don't know the official name). It has a long stalk and black roots every two to three inches along the stem. Would fish be eating this plant or is it something else?