Ich?

Saw this on my Longnose today and wondering if it's ich or debris. I saw something similar on one of my clowns a few weeks ago, but it had gone a few hours later. They often fan up the sand and send the stuff all over the place.

He seems fine, eating fine, follows the clowns all over the tank and doesn't seem distressed in anyway. no other spots on his fins of anywhere else, just this solitary white spot. It's on his body not his fin, although it looks like it's on the fin from this shot

 

Ignore me, it's gone now. I have a transparent goby who likes to eat the sand and drop out from behind his gills, while very entertaining to watch, it's means he clouds my water and it must be one of there particles that stuck on my LN