What is this weird stuff on my rock?

[kcinminni]

It's green and shiny and bumpy. It almost looks like overlapping worms or bubbles. It's in two different places (that I can see, anyway), and it's spreading. Anyone know what it is and if it's good news or bad news?

 

[SPC]

Do a search on Valonia (bubble algae) and see if that is what it is.
Steve

 

[SteveP]

Congrats, it sounds like you have a form of bubble algae. Emerald (Mithrax spp.) supposedly eat it (mine doesn't :x) as well as Desjardini tangs (mine does - sometimes :roll. Other than that you have to remove it manually. It's great stuff.

Steve
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[kcinminni]

Fantastic! I was hoping to add another "tank task" to my list.

Jeez! :roll:

 

[Anonymous]

My tang will nibble them when they are in the condition you describe, but not when they grow into bigger bubbles. I also have a mithrax crab and I've never seen it touch the valonia.

They are amazingly strong and cling to the rocks like crazy - be careful not to dislodge the rock along with the bubble!

 

[esmithiii]

My mithrax crabs love the stuff.

Ernie