ID polyp and possible algae

[havoline]

I was wondering what the polyp is on the rock in the picture with the clownfish. In the second picture, is some purpleish something, maybe a kind of algae growing on the rock. This is growing all over my rock and also as you see in the first picture growing on the return.

 

[yosemite sam]

The polyp looks like a Palythoa or Protopalythoa. As for the algae, do a search for Botryocladia and see if that's what you have.