In June, something ate all of the goldfish in my pond. I put off purchasing new goldfish until yesterday. At the store, I mentioned that something ate all of my goldfish and the clerk responded that a blue heron was spotted in the area and has eaten goldfish from a number of area ponds. So, I guess that mystery is solved. Though I’m not sure what to do to prevent this in the future. I’ve been doing some research on the subject and there doesn’t seem to be a good solution out there.