Weird white stuff on bowerbankii

[Acros]

I noticed weird white stuff where flesh and skeleton meet on my bowerbankii. Should I be worried? I used tap water with de-chlorinator earlier this week. I lost my 6-line wrasse today morning. Phosphate levels were high. So water alkalinity and calcium. I have done two 60% water changes with RODI water today. All other water parameters were ok. The tank is 2 months old. The coral have been in there for 1.5 months.

What is that red dot on its side (right side of the picture)? Only noticed it this week.

Edit: Updated with a better picture.

 

[tsouth]

See messenterial filaments, a defensive response

 

[Acros]

Defensive to the bad water parameter from the water change I did?

 

[vetteguy53081]

Nematocysts which are evasive and can sting coral. Cut away with a hobby exacto knife

 

[Acros]

should I physically remove them from the skeleton?

 

[Hemmdog]

If it’s showing a feeding response like that, feed it some mysis, it may buy you some time.

 

[Rogued_Reefer]

Don’t touch the filaments, clean the skeleton of the “red things” keep good water and feed it it’ll be alright

 

[Acros]

Looks like it was a vermetid snail. I scrapped it off. I don’t see anymore in my tank. Fingers crossed.