What is this thing? (Came on KP aquatics rock)

[zdrc]

What is this thing circled in red? Kinda looks like a tiny anemone? It came with 10 lbs of live rock from the Gulf

 

[WheatToast]

Looks like an urchin, possibly a slate pencil urchin (Eucidaris tribuloides)? I'm not that great with echinoderms.

 

[DeniseAndy]

Hard to tell, but could be a baby urchin or an anemone. Really hard to tell.

 

[steveschuerger]

Pretty sure it’s a variation color wise of pencil urchin. I got one with my KP rock. Tho mines more reddish/brown

 

[Dburr1014]

What is this thing circled in red? Kinda looks like a tiny anemone? It came with 10 lbs of live rock from the Gulf

Idk, that pic is to blurry to tell. Can you get a close up on each one and post.

 

[zdrc]

Idk, that pic is to blurry to tell. Can you get a close up on each one and post.

It walked away and I can't find it now. I guess time will tell. It was really tiny.

 

[JoJosReef]

Close-up would be better. My first thought was curlique nem, but if it doesn't have the oral disk and is spikey all around, could be the small urchin.

White circle is definitely spaghetti worm.

 

[vetteguy53081]

Highly likelihood of spaghetti worm and no doubt Pencil urchin (great algae eater)
Agree, , , could use better pics under brighter white to confirm. You can also aim LED light at them and take pics