White balls

[LowLi]

Any idea what these are?
Background story
Bought tank off craigslist 5 years ago left it zero maintainance till April of this year.
Salinity got too 1.010 never did water changes just topped off.

I got back into it. Re stocked tank everything is going well so far.

 

[cristata.reef]

Pineapple sponges. Harmless/beneficial filter feeders

 

[LowLi]

Pineapple sponges. Harmless/beneficial filter feeders

thanks ton of threads led me to that but no pics on em cause old threads