Worm(?) Identification

[AnotherHumanPerson]

In my 10 gallon guppy tank, I noticed that there were weird worm-like things on the glass. 
 
 

The photos may be a bit blurry due to my crappy iPhone camera. They look like tiny worms with a reddish-brown section in the middle of them with a tiny round “head”.

Are these going to harm my fish and/or fry, or are they completely harmless ?

[Adam Swarbrick]

It’s hard to tell from your photos does it look something like this?

If so then it’s called planaria typically they eat on any leftover food in an aquarium. In generalI I don’t believe they are harmful but people have reported them to eat on shrimp, I haven’t ever seen it happen with my own eyes.

[anitstuk]

On 8/3/2022 at 8:58 AM, Adam.S said:

It’s hard to tell from your photos does it look something like this?

If so then it’s called planaria typically they eat on any leftover food in an aquarium. In generalI I don’t believe they are harmful but people have reported them to eat on shrimp, I haven’t ever seen it happen with my own eyes.

I agree. I hear people say that fish will eat the planaria also so if you have some hungry fish in your tank, you shouldn't need to worry

[nabokovfan87]

Doesn't look like planaria to me.  Try ti clean the glass, at night try to check for them again and get a better photo.  Also, check if they are free floating and try to record a video of their movement.

Here is the video and stuff I gathered on my worms.

 

[AnotherHumanPerson]

On 8/2/2022 at 4:58 PM, Adam.S said:

It’s hard to tell from your photos does it look something like this?

If so then it’s called planaria typically they eat on any leftover food in an aquarium. In generalI I don’t believe they are harmful but people have reported them to eat on shrimp, I haven’t ever seen it happen with my own eyes.

That is similar, but not quite right. They have more circular heads and the orange-ish part bulges out a bit.

[anitstuk]

I've had a second thought and it might be Detritus Worms. Try get a better photo so we could see the features. 

[nabokovfan87]

On 8/2/2022 at 4:48 PM, AnotherHumanPerson said:

That is similar, but not quite right. They have more circular heads and the orange-ish part bulges out a bit.

There is one called rhabdocoela, but in terms of the color that points to a planarian type of worm.  There are several different shapes and types.  Let me see if I can find the article I was reading yesterday.

https://rsscience.com/planarian/


If it's a round shape, tube shape, it's probably detritus worms (do not take that as confirmation), but if it's flat shaped I would review the information above.

[Brandon p]

I think detritus worm. 

[AnotherHumanPerson]

I haven’t been able to get any photos of them in a higher quality than the ones above, but I do believe they may be detritus worms, as I have seen several moving in and out of detritus patches next to the glass. They also do appear to be more tubular and they don’t resemble planaria.

[PotatoFish]

Planaria or detritus worms, my guppies nommed them just the same as hydras. I'm sure yours will as well.

Admittedly, a part of me is a little irked watching detritus worms wriggle around the water. I just have to remind myself they're fish food, not fish parasites.

[Biotope Biologist]

Sounds to me like a Naidid worm of some sort. Pics are far too blurry for me to I.D, but based on the description...

 

This is a family of worms that are often called detritus worms.