Are All These Sponges Normal?

[Reinhold]

In the past couple of weeks, I've noticed the proliferation of hundreds of little white sponges on my LR, mostly in shaded areas. Is this good, bad, or neutral?

As usual, everytime I try to take a photo, Killer Hwkfish comes and sits in front of the camera. The sponges are the little white tufts in the center of the photo.

[ranaman]

My SWAG is they are tunicates or sea squirts. Like sponges these eat bacteria, algae, and detritis so they do act as a filter improving water qualitiy.

[Aragorn]

Yep,

It's cool. They're good guys. Got tons of 'em in my refugium.

[Firefish]

Are these the things that strech out at night like a string and bob around, then as soon as you put a flash light on them they coil up...?
If so, I have tons of them too, and they move from rock to rock!

[Reinhold]

These don't move or change shape. They look like the cotton tip of a Q-Tip, with a small tuft at the distal end. Each one is a discrete organism.

They don't look like any Sea Squirts I've ever seen. They're "cottony" in texture and grow to about 1 cm in size.

[SCETT316]

Not to long ago I was also wondering, when I discovered tons of them in my overflows, and quite of few in my LR. From what I have read, and been told. there good.