Strange Growths in RBTA Tentacles

[Beverly]

Was looking at our RBTA this morning and noticed some white, thread-like growths inside a few tentacles. They could have been there for days or weeks for all I know, but I just noticed them today.

Anybody have any idea if this is normal or if there is something wrong with the RBTA?

TIA

120g BB tank
2 x 175w 10,000k MH
4 x 65w PC actinics
alk 12 dkh
Ca 460 ppm
Mg 1370 ppm
80 F
located in a lower flow area
minor adjustment to rock it is on yesterday
15% water change and regular maintenance yesterday

Circled areas indicate some of the tentacles affected....


Close up of one of the affected tentacles...