Critter/Bacteria ID

[Teamtang92]

These popped up I think maybe 3 or 4 months ago. So far I haven’t noticed any harm in my tank. They are all over my sump but not in my display thankfully. Does anyone know what they are? It’s hard to see because of my fuge light but they are white and puffy/fuzzy. Any information would be a great help, Thank you!

 

[Brad Miller]

Hard to tell but looks like pineapple sponges to me...harmless and will disappear in time, sign of a healthy start

 

[Teamtang92]

Hard to tell but looks like pineapple sponges to me...harmless and will disappear in time, sign of a healthy start

I looked up pineapple sponge, that’s exactly what they are! Thank you for your help!