White blobs that look like coral

[Unclebob]

Just noticed some white blobs on my live rock only 3 or 4 of them. They look like tiny corals but I thought I would see what you guys think. Here are a few picks. Focus on white spots.

 

[cosmo]

pineapple sponges, harmless filter feeders, should be a bloom of them, then they eventually go away, usually.

 

[grinder]

pineapple sponges,harmless filter feeders