Sponges

[Ninjafish40]

Will sponges move ? I've got this one that has moved a little but I thought they were pretty much stay put kinda things

[Ninjafish40]

Here it is

[Ninjafish40]

Here it was

[Sniperhank]

Sponges are not able to move.

[Ericwm]

They do tend to die off and others appear elsewhere. I had a bunch on one rock, now they are gone but new sponges are forming everywhere else in the tank.

[Droneshooter]

I have a lot of theses guys on some of my live rock are they harmful in anyway later down the road

[Sniperhank]

Totally harmless filter feeders.

[Dav3]

Originally Posted by Sniperhank

Sponges are not able to move.

Actually I disagree. I have seen pineapple sponges move. The put long fibers to attach to a surface and then pull themselves towards that surface. Kinda a Spider-Man move.

[Gregcoyote]

There are only hundreds of different volunteer sponges people ID as pineapples, if this one is calcareous, it probably doesn't move in the traditional sense. But they are a good sign water quality is good.