Are these worms in my tank?

[Shovad]

Hi,
Can someone identify if these are worms? If so should I be concerned?

 

[Uberhoust]

Could be, but the image is too small to make out the creature.

 

[Abaddon]

Have you seen them move? From the photos it looks like either some sort of planarian (harmless unless there's tons of them - indicative of poor water quality), or fish poop XD

 

[PorshaF]

Also be concerned if its white fish poop, indicator of internal parasite. Just had a baby koi die because I didn't catch it in time. What kind of fish?

 

[CaptainBarnicles]

Looks like poop to me

 

[I Like Rare Fish]

Touch it ?

 

[Shovad]

Hi thanks for the replies, I believe it was fish poop- wasn’t moving when I turned off filter and bubblers.