What are these? Someone help

[Joshsmit56001]

The first pic is a coral I have in my tank that I am not sure what it is.

Second pic is a pic of my hammer coral, except on the inside of them there is some brown that I am concerned about.

Please let me know what these are.

 

[Joshsmit56001]

Pics are backwards, 1st pic is hammer and 2nd pic is what coral is this?

 

[JPloman]

On the hammer it looks like algae, but are those air bubbles on them? Do you have a lot of air flow in your tank or did those appear with the brown stuff?

The coral looks like some sort of mushroom coral. Not really sure though.

 

[steve-s]

The hammer is not clear. If possible try taking the pic at a different angle or with the flash. Can't tell what the circled area's are, it's too dim.

The small coral looks like the beginnings of a Turbinaria reniformis.

Cheers
Steve