What’s this

[mraysberg]

Can you get a pic like that under white light?

There ya go

 

[ISpeakForTheSeas]

There ya go

Hmm, the spotting on the tentacles is not typical of any corallimorph I know, and it doesn't look right for any of the club-tipped true nems I recall at the moment - does it have a skeleton?

I ask because I usually see this kind of tentacle (thick and stubby with the ball tip and irregular spotting) on LPS/NPS corals, and those are a bit out of my wheelhouse. Maybe @EeyoreIsMySpiritAnimal or @encrustingacro would have an idea here if it is a coral.

 

[mraysberg]

Hmm, the spotting on the tentacles is not typical of any corallimorph I know, and it doesn't look right for any of the club-tipped true nems I recall at the moment - does it have a skeleton?

I ask because I usually see this kind of tentacle (thick and stubby with the ball tip and irregular spotting) on LPS/NPS corals, and those are a bit out of my wheelhouse. Maybe @EeyoreIsMySpiritAnimal or @encrustingacro would have an idea here if it is a coral.

I don’t believe it has a skeleton it seems like it has a foot. Going to make it close up and take another pic to post

 

[encrustingacro]

Doesn't look like a corallimorph; I would guess it's a juvenile stony coral. I believe I see a skeleton. Would need to grow it out to see what it is.

Based on the ball-tips there, most likely a Ball Anemone (Corallimorph), though I'm not sure what kind (closer up, clearer pics could possibly help there).

Other Anthozoans can also have prominent acrospheres, not just ball anemones.

I don’t believe it has a skeleton it seems like it has a foot. Going to make it close up and take another pic to post

An attached juvenile Scleractinian would also have a "foot"-like structure, where the skeleton is attached to the substrate.

 

[encrustingacro]

Hmm, the spotting on the tentacles is not typical of any corallimorph I know

The "spotting" on the tentacles are nematocyst batteries by the way.

 

[mraysberg]

Made it close up so you guys can have a look

 

[encrustingacro]

Judging by how it appeared at the bottom of your Acanthophyllia, it could be an anthocaulus of said coral, although this would be the first time I have heard of Acanthos budding.

 

[mraysberg]

Question is do I get rid of it or let it grow some more before making the final decision

 

[ISpeakForTheSeas]

Other Anthozoans can also have prominent acrospheres, not just ball anemones.

Yeah, I noted that with the club-tip nems, LPS, and NPS - they're not as common as hitchhikers though.

The "spotting" on the tentacles are nematocyst batteries by the way.

Thanks - it's been awhile since I've read up on cnidarians, and I tend to forget the terminology unless I've come across it frequently.

Question is do I get rid of it or let it grow some more before making the final decision

Personally, I'd keep it and just try to move it off the coral if you're nervous about it - I'd imagine if it's harmful that you'd see the coral being irritated before it could cause any major issues, though, and you'd have a chance to move/remove it then. If it's not harmful or it's another coral, then you got a cool hitchhiker.