what kinda mushrooms are these?

[besba]

I impulsely bought a piece of live rock with mushrooms all over it in Fl. this weekend. I've had a FO tank till now. They are orangish-brown. What kind might they be? How do you take care of them. Can they handle nitrates of 80ppm?
55Gal Wetdry with 500GPH pump. 2"DSB. 40pds LR. 1 Tang. 1 coral beauty. 1 foxface. 1 cardinal. 1 sea urchin.(he came with the mushrooms)

 

[stupid_naso]

My guess would be it's a regular mushroom. They come in different colors. As hardy as mushroom can be, I don't think 80 ppm nitrate is a good thing to have when you want to keep mushroom. Try to decrease it by water change, or decreasing feeding.
They are a great addition for a beginner reefer. Mushroom was the first coral I bought .
Here's a link for more info on mushrooms...
<a href="http://www.reefcorner.com/SpecimenSheets/mushrooms.htm" target="_blank">mushrooms</a>
And I forgot, Happy Birthday!!
stupid_naso