Found under zoa plug!!! ID

[alonso24k]

Some of my zoas have been staying closed lately . Today I decided to move them around and found 3 of these guys under the frag! What is this and is it harmful? They are real small flat and round and can run pretty fast. Sorry about the video and pictures..

 

[alonso24k]

@Lionfish Lair @Lionfish @lionfishlair

 

[KJ]

Copepod.

 

[Diesel]

Can be small nudi's too.
Did you dip your corals before entering the tank at first?

 

[Lionfish Lair]

I believe it to be a serolid.

 

[meir]

Definitely some kind of slug prob zoa eating nudis (the ones stuck to the bottom of the plug) tho I'm not sure about the swimming one