Hitchhiker on live rock, ID if possible

[CurtPGA]

Purchased some live rock from a tank breakdown. Was going to boil it but had a spare tank and thought why not, let's see what happens. Day 1 this guy sprouts. Any idea what it may be?

34 years off and on saltwater aquariums. Planning on using in a coral only tank.

 

[stE25wy14]

seems to be some kind of nem
@OrionN

 

[CurtPGA]

seems to be some kind of nem
@OrionN

Thanks stewy14. That's what I was thinking also. It's in a tank with my saltwater guppies only so I'll give it a month to grow and see if we can better id it then.

 

[mww00ds]

Kind of looks like a bleached Rock Flower nem. Where the rock from originally?

 

[ScottJ]

FWIW, BAD idea to boil rock, explosion risk, palytoxin risk. Could lead to a bad day.