a shiny black ball has appeared

[stealthawd]

On a piece of my LR there has popped up a shiny black ball. I haven't touched it to see if it's hard or soft but it is real shiny black and smooth and about the size of a marble. No, it's not a marble LOL.

Any thoughts on what the heck this thing is? I took a pic but it's not super clear. I will post the pic tomorrow when I transfer it to my laptop. This thing just kinda popped up outta nowhere...it's really cool looking but it has me completely baffled.

Also, there is a plant that started growing on the rock. It hasn't hurt anything and has been there for approximately a month.

Tank consists of:

Cleaner shrimp - 1
Fire shrimp - 1
False Percs - 2 (although one has been MIA for a while)
Chromis - 2
BTA - 1
Starfish (bright orange) - 1
Emerald Crabs - 2
Fighting Conch - 1
Several snails of various sizes and species
Several Hermits of various sizes and species
One sponge that I'm not sure what it is...it's orange and looks like a Chock-O-Stick.
Several snail looking things that I believe are Abelones

 

[angelo184]

more then likely it is bubble algae, emerald crabs will eat them

 

[kkyyllee]

bubble algea, not good, seeing as how you have 2 emerald crabs, they either dont care about it or havent noticed it yet....dont pop it tho

 

[szwab]

if it is valonia (bubble algae) just carefully pop it off and throw it away. If left unchecked it will more likely spread and become a nuisance. If you have a pic post up to be sure of what it is.

 

[stealthawd]

Here are the two pics. Forgive the quality, all that I had handy was my cell phone. Looking up bubble algae on google images, it does look like that. ...and here I was excited that I had something cool in my tank LOL

 

[Grins]

Looks like bubble algea. When removing it take care not to pop it.