Cyphastrea Flesh Changing Appearance

[zachxlutz]

I've noticed a change in the flesh on this Cyphastrea.

I've had it in the system for about 5 months now. Great growth and great coloration. I just noticed that the flesh around some of the polyps appears to look "torn". The areas where I see it the most are near the polyps at the lower part of the coral where it's encrusting over the live rock.

All other coral in the tank are showing great polyp extension, coloration and growth. This issue appears to be confined to this particular piece.

Has anyone else seen anything like this?

Tank:
120 Gallon Display
55 Gallon Sump
Total water volume 150 gallons
ATI Sunpower 8x54 watt T5 lights

Parameters:
Temp: 78* F
Salinity: 35 ppt
Ph: 8.0-8.2
Alk: 8.3-8.5
Ca: 430-435
NO3: 3-5 ppm
PO4: .01-.03
Mg: 1380
(all parameters are very stable, I test very often)

Dosing (through dosing pumps):
BRS Alk/Cal: 31.5 ml daily each
Red Sea Coral Colors ABCD: .6ml daily each

Dosing (manual):
Nitrate: KNO3 - as needed, usually 10-20ml (28g/150ml solution) weekly
Vibrant: Weekly

Feeding:
Dry: Pellets, 4x daily through auto feeder
Frozen: Mysis, daily or every other day

If you have any other questions, please don't hesitate to ask. If you want to see some more photos of the tank, please click the link in my signature.

 

[zachxlutz]

For reference:

Here's a photo from 02/28/2017 showing the coloration and growth.

 

[zachxlutz]

Update:

Flesh appears to have gone back to original color and polyp extension and color looks great. Growth continues. Seems to have just gone through some sort of phase.