What is growing on my live rock?

[Minosimports]

Look at pic. It flows bright red under blue lights.

 

[Subsea]

Look at pic. It flows bright red under blue lights.

Where is the picture?

https://www.marineplantbook.com/marineplantbookredalgae.htm
See if this helps.

 

[Monkeyfish]

It is the dreaded Algus Invisibilus, the bane of all aquariums. Either that or I'm unable to see the pic too.