A couple of strange one's for ID please

The first is growing all over the bottom of my LR. It has grown considerably over the last 3 months. Has been there for a lot longer.





The 2nd looks like some kind of colony. Its about the size of a silver dollar and has also grown a lot in the last couple of months. The white specks are just sand grains.

 

The first picture is a harmless sponge

In the third picture, the white spikey thing to the upper left of the coralline is also harmless. It's a foram. Foraminiferans by Ronald L. Shimek, Ph.D. - Reefkeeping.com

Can you get a more detailed picture of the large maroon thing?

 

I tried to get another pic for ya. This is the best my macro on my camera will do.



Heres a perspective pic to get an idea how big this is.



I hope this helps a little

 

If you scrape it with your fingernail, is it a hard substance, does it scratch off, etc.?

 

Not a good picture but maybe a species of macroalgae!

 

just sponge and coraline

 

I took the liberty and adjusted your picture a little bit, its easier to see now.

Looks like a type of bubble red algae to me, I have it in one of my tanks but I am taking that tank down this weekend. I would let others look at this picture and see what they say but if it was me I would remove it.

 

It does appear to be Red bubble and if so get it out ASAP! It will over run the tank.