I bought more blackworms and like the first batch this one has leech like critters in it. When I poured the blackworms out I put some of the leeches that were still clung to the bag into a 16oz container. That was 2 days ago and just now I noticed that the 1 blackworm that was in the container with them is gone. I put about 1/2 dozen more blackworms in with them and watched. These leeches (if they are leeches) like eating blackworms! I wonder how the blackworm farmers can have worm predators without it becoming a problem.