Odd black colored growth on live rock

[Shad Quill]

Noticed this growth today and I cant find any info as to what it is... anyone recognize it?

Here's a couple pics, one with out and one with flash

 

[Reeferdood]

Sponge perhaps, likely a hitchhiker and not a bad one...
FWIW sponges are not a bad thing but they can choke out corals.....

 

[KJ]

Sponge.

 

[rkpetersen]

I'm not convinced those are sponges. They're seem quite flat and at least one of them appears to have a possible mouth right in the center of what looks like an oral disc. A better picture would be helpful but these could be mushrooms.

 

[Shad Quill]

I'm not convinced those are sponges. They're seem quite flat and at least one of them appears to have a possible mouth right in the center of what looks like an oral disc. A better picture would be helpful but these could be mushrooms.

You are correct. They appear to have mouths and there are 6 distinct ones all have the same shape and build in general.

 

[DSC reef]

I agree with sponge. We had types of sponge that actually had a type of siphon to take in water.

 

[Muttley000]

The "mouth" is called an osculum. Many sponges have them, some even have multiples.

 

[Lovemyreef2015]

It is Sponge