Sponge? Tentacle-less nem? Mutant mushroom? You decide...

[Monochrome5]

So I was looking at my tank this morning and noticed this little guy sitting on top of my rockwork. It's about the size of a tiny zoa. It hasn't moved all day, but that doesn't mean it won't... Looks to have a tan mouth in the middle there, so I'm thinking it isn't a sponge. No tentacles that I can see, so it isn't a zoa or nem. Segmented like an orange, so it isn't a mushroom. So... what the heck is this thing?

 

 

[carbon-mantis]

Pretty sure that it's a macroalgae, but can't remember the name. I'm wanting to think "mermaid's something-or-other" but those are bigger than the one you have, IIRC.

[Monochrome5]

Pretty sure that it's a macroalgae, but can't remember the name. I'm wanting to think "mermaid's something-or-other" but those are bigger than the one you have, IIRC.

 

 

Mermaid's wineglass? Those were stalked I thought.

[DaJMasta]

Mermaid's shotglass?

 

It is stalked, but the stalk will grow with time.

[spanko]

Acetabularia schenckii ?

 

[Monochrome5]

Cool. Thanks guys. Looks like a pretty neat macro. I think I'll keep it in there

[thecowkid]

Looks like what I have. Only mine are crazy small. I wish I had pulled it out when I first found them. Now they have overtaken the rockwork.

[Monochrome5]

Looks like what I have. Only mine are crazy small. I wish I had pulled it out when I first found them. Now they have overtaken the rockwork.

 

Yeah it's about half the size of an M&M. Really small. And after a recent rescape... buried under some chaeto