Two critters on hammer coral

[Santac]

Hi,

I just noticed two critters or something else on one of my hammers that is about 2 months old in the tank.

Looking at old photos the top one seems to have been on the coral for a long time. It looks like a small starfish when open (see first picture), but when touched it recedes inside the coral.

The second black thing seems to be newer and hopefully is clear enough on the video. Included a side picture of it as well.

Any ID and advice on if I should try to get rid of them (and how) would be much appreciated!

 

[DDenny]

Not sure about the first one but second looks to be a vermitid snail. If it is cover the opening with superglue and they die.

 

[Charlie the Reefer]

First one could be a baby polyp. Sometimes they sprout those baby polyps out the side. Can’t be 100% without a better pic.

 

[Brazilian Reefer]

First one could be a baby polyp. Sometimes they sprout those baby polyps out the side. Can’t be 100% without a better pic.

That’s what I was going to say, looks like baby to me too

 

[Rjukan]

The purple is most likely a vermetid snail, and you can just crush it with your nail.
(The rhyme wasn't intentional lol)

 

[Minifoot77]

Coral boring spiodid worm on the last one