Help Identify this Worm

[Bnagle]

Does anyone know what type of worm this is? It seems to be sometype of flatworm that covered itself in sand. It’s not red and doesn’t look like AEFW. Much bigger

I found this pic online that it somewhat resembles

 

[Crabs McJones]

Maybe some type of Planaria flatworm. Are you able to rinse off the sand from it? Is it still alive or dead?

 

[Bnagle]

Tried getting sand off but no luck. I pulled it off a new leptastrea coral.

 

[reef lover]

When in doubt toss it out...