Barnacle?

[MLHoenig]

Just noticed this a few minutes ago.

Looks like a barnacle but I’m still learning the ropes (even though I’ve had a tank for nearly three years)

What do y’all think?

[Sniperhank]

Is it actively moving at all? Opening/closing? It could be a handful of bi-valves from what is shown.

[MLHoenig]

Originally Posted by Sniperhank

Is it actively moving at all? Opening/closing? It could be a handful of bi-valves from what is shown.

No movement that I could detect…

My apologies; I provided no size comparison.

It’s somewhere around ⅜” across…

And it’s pretty much dead center in the picture.

[Sniperhank]

Well, it is a bi-valve...just hard to tell exactly what it is. Most likely dead and just a shell hanging onto the rock still.

[MLHoenig]

Okie-dokie; thanks!

I never noticed it before last night …

[54seaweed]

I find stuff like that all the time most of it is fossilized into my live rock once the saltwater erodes at it it starts popping out . so I'm always finding new things the neatest thing Ive found so far is a fossilized star fish , It's like a treasure hunt in your tank I find most of my discovery's after lights out , I uses a flash light with a red lens it don't seem disturb the fish or inverts at all , the red light picks up on things you don't see with the naked eye . I can never get bored roaming my tank at nite it's like a world of it's own .

[bribo12]

Barnacles extend feather like appendages to feed so if you haven’t seen those it probably isn’t alive.

[54seaweed]

I just came across this it may help with a more accurate Id