New Macro - What is this thing???

[GuOD]

Is this thing a sponge or what?

And here are some tunicates (I think). They spread very quickly on this rock/coral.

 

[danskim]

The top picture is definitely a type of cnidarian, but I don't know exactly what it is.
The bottom picture does appear to be tunicates, but again, I'm not entirely sure.
Someone else probably would know much better than me

 

[edwing206]

What ever they are they're nice!

 

[gregr]

The top one looks a bit like some Cyphastrea that I saw recently, though the color is different. I agree that the bottom one is probably a tunicate.

 

[John99]

They look pretty cool