Acan coral growth

[chrisgold]

Anybody know what this isni
On the side of this acan i bought anout 2 weeks ago and have just noticed it

 

[Dkmoo]

Do you have a better picture? Can't tell for sure from the blue light and angle but if yiu are talking about that pyramid thing that looks like a limpet

 

[chrisgold]

Ther are a few of these soneone said they could be new heads growing?

 

[chrisgold]

Do you have a better picture? Can't tell for sure from the blue light and angle but if yiu are talking about that pyramid thing that looks like a limpet