Poop,Worm or fish part?

[FallenPepper]

Any ideas on what this is? I've never seen my bichir or puffers poop like this but it looks like a liver or possibly a piece of an organ. Any advice on it would be nice

 

[CryptFan]

Picture?

 

[FallenPepper]

Picture?

 

[FishGuest5123]

@Colin_T will tell you what it is.