Liliw Posted April 17, 2022 Share Posted April 17, 2022 I just recently started buying live black worms & I saw this strange thing inside the bag, it was moving around clearly alive with the worms. I’m worried it’s some kind of parasite but I haven’t a clue. Could someone please help indentify what this could be? I really hope I haven’t put my fish family in danger before I noticed! Link to comment Share on other sites More sharing options...
TheSwissAquarist Posted April 17, 2022 Share Posted April 17, 2022 Black worms are often bred in ponds, so it could just be a by-catch? Does anyone here breed black worms? Have you seen anything like this before? 1 Link to comment Share on other sites More sharing options...
Colu Posted April 17, 2022 Share Posted April 17, 2022 Looks like a leech to me 2 1 Link to comment Share on other sites More sharing options...
Wrencher_Scott Posted April 17, 2022 Share Posted April 17, 2022 (edited) My guess is planaria. lots of info here: https://aquariumscience.org/index.php/10-13-pests/ Edited April 17, 2022 by Wrencher_Scott 1 Link to comment Share on other sites More sharing options...
Biotope Biologist Posted April 18, 2022 Share Posted April 18, 2022 I second @Colu 1 Link to comment Share on other sites More sharing options...
Liliw Posted April 18, 2022 Author Share Posted April 18, 2022 (edited) Thank you for the replies! Anything I should do to take precautions since I was feeding these black worms before I noticed? @Colu @Biotope Biologist @Wrencher_Scott Edited April 18, 2022 by Liliw Link to comment Share on other sites More sharing options...
Biotope Biologist Posted April 18, 2022 Share Posted April 18, 2022 If your fish are large enough to eat it they will, otherwise you can euthanize it by freezing it. Leeches are fairly common especially in black worm cultures. I’ve never actually had one attach to my fish though. 1 Link to comment Share on other sites More sharing options...
AndEEss Posted April 18, 2022 Share Posted April 18, 2022 Looks like more food. 1 Link to comment Share on other sites More sharing options...
Wrencher_Scott Posted April 18, 2022 Share Posted April 18, 2022 On 4/18/2022 at 10:31 AM, Liliw said: Thank you for the replies! Anything I should do to take precautions since I was feeding these black worms before I noticed? @Colu @Biotope Biologist @Wrencher_Scott If you don't have snails or shrimp no worries at all. I'm with the rest, fish food. I think I would stick with frozen foods from now on though. I say that because I don't know enough to know if I should be worried about what's in live food. Did that make sense? 🙂 Link to comment Share on other sites More sharing options...
Odd Duck Posted April 18, 2022 Share Posted April 18, 2022 Yep, leach. I would remove it unless you are confident your fish will eat it. 1 Link to comment Share on other sites More sharing options...
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