wildbill5150 Posted May 28, 2021 Share Posted May 28, 2021 For the past couple months these white "critters" have appeared in my small (2 gallon) shrimp tank. Can someone identify them and let me know if they are harmful to my shrimp and catfish? Thanks, Bill Link to comment Share on other sites More sharing options...
Bru Posted May 28, 2021 Share Posted May 28, 2021 It looks like you have planaria, I just see it as a healthy little ecosystem and snacks for the fish to munch on. ^^ Link to comment Share on other sites More sharing options...
Mmiller2001 Posted May 28, 2021 Share Posted May 28, 2021 Some type of flat worm, but I don't think it's planaria. This is planaria 1 Link to comment Share on other sites More sharing options...
NanoNano Posted May 30, 2021 Share Posted May 30, 2021 (edited) I think what you might have are Rhabdocoela worms (they hitchhiked into two of my tanks on plants). Unsightly, but harmless and another creature that will work your mulm and substrate. I haven't had any issues with them in a tank where I have breeding blue dream shrimp (other than my freaking out thinking that they were planaria or snail leeches of some sort). When they first appeared they would cruise over the tank glass and decor in bright light with no shame- now that they're established they're 99% nocturnal. Edit- I should mention that my Rhabdo worms tend to move at fairly constant speed, in fairly straight lines, and adhere to surfaces. The Planaria that I've seen seem to almost float over surfaces, move with a lot of stopping and starting, and frequently change direction as if they're hunting for things. Edited May 30, 2021 by NanoNano 2 Link to comment Share on other sites More sharing options...
wildbill5150 Posted June 7, 2021 Author Share Posted June 7, 2021 Thank you for the information. Just wanted ot be sure they weren't harmful Link to comment Share on other sites More sharing options...
Guppysnail Posted June 7, 2021 Share Posted June 7, 2021 I agree w @NanoNano. Rhabdo Harmless natural part of the ecosystem. Whenever mine brave the glass my CPD snatch them right off the glass. Whenever my Bnose Plecos find them you can tell they wiggle like excited children Link to comment Share on other sites More sharing options...
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