Algae identification

[MrBubble47]

Hello everyone!

Could you help me identify these algaes that are growing in my tank please?
I think that one of them is a Caulerpa racemosa, the other one looks like an Acetabularia calyculus to me.

What do you think? Are the names correct?
Do you think that an emerald crab could get rid of them?

 

[Aiden Graves]

Grape Caulerpa or bubble algae. I’m pretty sure the top left one is grape caulerpa.

 

[samnaz]

The algae on the right side is likely some type of Acetabularia, maybe A. caliculus.

 

[MrBubble47]

Here's some closer pics.
A new one to identify too please.

 

[MrBubble47]

New additions to the tank to try to fight those algae: Mithraculus sculptus and a pink urchin.