Can anyone ID this?

[MrsBugmaster]

I got a couple new fish delivered today. I did a peroxide dip and some small white things were on the bottom of the container. Not sure if fish pooped it out or came off of fish body. It was a little bigger than a pin head and this is what I found under the microscope. This was inside the white dot.

 

[Timfish]

A piece of it's gill maybe?

 

[Jay Hemdal]

I got a couple new fish delivered today. I did a peroxide dip and some small white things were on the bottom of the container. Not sure if fish pooped it out or came off of fish body. It was a little bigger than a pin head and this is what I found under the microscope. This was inside the white dot.

Just guessing here - could be pleopods from a mysis shrimp that the fish ate, but didn’t digest.
Jay