Uhgg... do i have flatworms

[Sailfinguy21]

I was checking out my coral QT tank today and i noticed a little black dot on the glass.

I took it out if the tank and its flat.. black and wiggles just a flat black wiggly creature.

I took a up close pic of it.

Ive never seen this before. I didnt get 3 new corals recently a giant like tenis ball sized acropora.. and a green leptoseris and some orange coral i forgot the name off hand. So it probly came from one of them.

Is there a chsnce it could have just been 1 and ill get lucky and see no more or what do you guys think ?

 

[KJ]

Hard to tell from the pic.

 

[sfin52]

does it have a hard shell. It reminds me of a limpet.