Black lump Duncan Coral

[little_dread]

Can anyone ID this black lump on my Duncan Coral?
The coral has had the hump for over a week now and wondering if it’s this that’s causing it.

 

[attiland]

Can anyone ID this black lump on my Duncan Coral?
The coral has had the hump for over a week now and wondering if it’s this that’s causing it.

That pic doesn’t show much. Way too dark

 

[MaxTremors]

Hard to tell, but I think I maybe see a vermetid snail?

 

[WheatToast]

That pic doesn’t show much. Way too dark

+1. We need a picture under white light as well (ex. with a flashlight).

 

[vetteguy53081]

Looks like tunicates.
Clear pic under white light will help confirm