What is this?

[Rookie]

Got some better images from the last time i tried identifying on Facebook, thought it was pavona but its not growing up, its just growing across the rock. Any ideas? Its basically just working its way across the rock

 

[Luigi]

It does looks like a Pavona coral, ? I had a purple Pavona and was mainly encrusting for a couple of years before I saw leaflet / chip
A few reasons that corals, encrust sideways is:
Creating a base for the
Coral / colony
Po4 could be high
Flow, and light

 

[Rookie]

Thanks Luigi, its definitely in a high flow area, nitrates right now are reading zero (i still don't trust my test kit)