Funny acting fish

[Gill Roy]

I have a 65 gal. reef with a few fish that are starting to act funny.
I noticed that one of the Chromis are kinda "darting and bouncing" off the side of my Scissortail Goby. Then I notice my Dottyback doing the same thing to a few different rocks. And today my Royal Gramma is doing it to the back glass and a little tuft of green hair algae on the tip of my LR.

Don't see any skin defects at all, water all good.
????

 

[Blackhawk Fan]

Sounds like they are trying to rub off some parasites.

 

[Gill Roy]

Sounds like they are trying to rub off some parasites.

I considered that as well.
What sort of things should I look for?

The fish all look healthy, my corals are healthy, showing good growth, color and extension.