No clue what this is growing on coral!

[bhaynes88]

I had to do an emergency tank swap from a 90 that sprung leak down to a biocube 32 anyways so far so good today as I was doing a water change and looking over coral frags I noticed a growth on the bottom skeletal structure on both my Duncan and Hammer coral 

my params are as follows

salinity is 1.026

nitrate 5ppm

nitrite 0

ammonia 0.25 

ph 8.3

alk 12

calcium 340

do not have mg test kit ordered today

i am working on researching best way to raise calcium before starting a 2 part anyways I will attach pic below to me it looks like a caterpillar  cocoon but obviously it’s not just trying to describe it.   

[FISHnChix]

Pineapple sponge..  

[uwharrie]

harmless as above post. Pineapple sponge. My back chambers used to be full of them

 

[bhaynes88]

Ok thanks for the info... it’s been a crazy last couple of days with the tanks and getting everything moved and trying to not loose anything... I am relieved that I don’t have more to worry about cheers!