ID Please

[bella123]

We have a white growth on the bottom of some of our corals, could someone let me know what it is

Thanks

 

[bella123]

Some more images, I have scraped some off one of the corals

 

[mcgyvr]

Totally harmless and beneficial pineapple sponges

Here is a great site for you to bookmark/reference in future ID requests..
https://www.lionfishlair.com/hitchhikers-guide/
It has most of the common stuff found in our tanks..and a simple thumbs up/down system..

 

[nereefpat]

I agree on the pineapple/q-tip sponges.

Harmless and common, especially in newish tanks.

 

[bella123]

Thanks for the replys