Little to none polyp extension is it my flame angel

[SWQuest]

Hi all like the title says I have little to none polyp extension, and I was wondering if it is my flame angel. All of my corals are growing witch are some monties, and acroporas. I do see my flame angel picking at them then when I come up to the tank he hides. My tank is a 120gal and all my tests are good alk 8
Mag 1400
Cal 420
Po 0.04
Nitrate 0
Salinity 1.024

Thanks

 

[Gyr]

I'd say yes. I had a yellow clown goby in my tank. I rarely saw him nipping at my SPS, but I struggled with cruddy polyp extension for a long time. My parameters were all good and coral growth was actually okay, but I just couldn't get any PE in the majority of my SPS. I was finally able to net the goby and got him out of the DT. Within a few days I saw a dramatic improvement in PE.
I'd suggest getting the flame angle out of the DT for several days and see what happens. Good luck, though, I know how hard it can be to catch a fish in a reef tank.