Coral Polyp texture

[matt99eo]

I have just introduced a t5 actinic to supplement my 250w 14500k HQI MH and have noticed what I would describe as a surface texture change in the polyps of my corals. They seem a bit rougher I guess.

What am I seeing

 

[GreshamH]

What corals are you talking about?

 

[matt99eo]

hydnophora and a fuzzy green tip mushroom anemone exhibit this the most. The polyp surfaces look