What is this?

[Alex2002]

Hello,

I need some help. What could this be on my coral sand? Is it harmful to the aquarium or can it be left in?

 

[homer1475]

Looks like fish poop to me.

 

[Alex2002]

Looks like fish poop to me.

Sure? I have quite a lot of them and only 2 little clownfish

 

[homer1475]

Hard to really tell to be quite honest, but yes it looks like poo.

 

[rc8t6353]

I agree with the others. Fish poo lol