We set up a new fish tank recently and got some red eye tetras. One of them developed a bump on his head which went away after a few weeks. Today we noticed these hair-like things growing out of the spot where the bump used to be. I saw another post that described something like these asking if they were anchor worms but there were no pics. This kind of looks like a fungus too. Really have no idea what it is.

Posted by Darfusthegreat

15 Comments

  1. That’s a fungus! You can actually see the little fruiting bodies (conidia) at the top of the hyphae. Not sure which one, but it’s no bueno. Usually fungal infections in fish are opportunistic so there was likely a prior wound or illness. I know more about infectious fungi than fish treatments though so hopefully someone else will jump in with some advice. Good luck!

  2. instagrizzlord on

    Anchor worms are kinda Y shaped. It’s so hard to tell but I’m gonna go with fungus for this one. I would put this guy in a hospital tank and treat with methylene blue. I would also treat the main tank with something less aggressive just to make sure everything there is good too. Avoid API brand meds that end in -fix. They aren’t very good but if that’s all you can get, better than nothing.

  3. Ok_Organization_7350 on

    Fungal infection. I would turn up the aquarium heater a little bit. Heat helps kill fish infections, just like a fever helps kill infections in humans.

    And you could go to the pet store, buy some fish aquarium fungus medicine, and follow the directions.

  4. I would net it and dip with a sharp cotton swab malachite green or methylene blue on that spot, and put it into a hospital tank

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