Please help identify small black item on live rock

[Saratj1]

I have a black thing on my live rock, maybe a sea urchin? I don't think it is an urchin but maybe? Could someone Id please

 

[Badfishofbabylon]

Kinda looks like an urchin, is it flat or does it have a rounded body like an urchin? And does it move around?

 

[Saratj1]

It has a rounded body like an urchin but it's spikes kind of seem softer or not as hard and pointy as an urchins

 

[Badfishofbabylon]

Does it move? If it's soft and doesn't move it might be a sponge, but I've never seen a sponge that solid black before.

 

[circus clowns]

Looks like

 

[circus clowns]

A black sun coral

 

[Badfishofbabylon]

Yeah your right it does

 

[Saratj1]

Update woke up this morning and no longer saw the black thing, I was like oh no it died, and then I saw it had move about an inch down torwards the underside of the rock.

 

[Saratj1]

It's getting hard to take a pic due to the angle of the phone to the glass if it moves any further I won't be able to see it. So does that mean its an urchin?

 

[Ricksreef]

Looks like a sea urchin

 

[Saratj1]

Thanks for the replies , another pic with question, do you think my domino is trying to host/co-habitate with my anemone? He hangs out under the anemone, but doesnt touch it and chases other fish away from the spot. Just curious, thanks.

 

[paulace2372]

No its unlikely, damsels are very territorial and I would say its more than likely that he has just found somewhere in the tank he likes to call his own for the moment.