Cyano? Coraline? Something else?

[deetu]

At first I thought this was coraline because I've been feeding my pink but it has a lip that turns up.  When I see images of cyano, it is flat and spreading.

It is about the size of a quarter and on a small piece of rock so would be easy to remove if bad. 

My tank is FOWLR and macro only.

[Joevember]

Looks like encrusting coralline algae. Some species look like montipora when they grow out. Nice critter!

 

This is an example from reefcleaners

 

[Thrassian Atoll]

Is it soft or hard?

[deetu]

5 hours ago, Joevember said:

Looks like encrusting coralline algae. Some species look like montipora when they grow out. Nice critter!

 

That would be sooo cool!

[deetu]

4 hours ago, Thrassian Atoll said:

Is it soft or hard?

I didn't touch it in case it was bad and would spread if broken...

I now want to touch it but it looks soft... like a thin piece of wet leather

[Thrassian Atoll]

5 hours ago, deetu said:

I didn't touch it in case it was bad and would spread if broken...

I now want to touch it but it looks soft... like a thin piece of wet leather

If it’s soft I would guess sponge.

[deetu]

On 8/19/2019 at 2:28 PM, Joevember said:

Looks like encrusting coralline algae. Some species look like montipora when they grow out. Nice critter!

 

 

I touched it and it felt hard but think I may have been feeling the rock under since it is so thing.

That would be really cool if it is encrusting coraline.  Someone else on another site suggested plating sponge which looks the same. 

I guess I will just have to wait and see what it becomes