ID needed (pic included)

[Mr31415]

Please can someone (Boomer?) ID these weird things for me - they grow on a piece of rock with yellow polyps:

 

[Reefmack]

my guess is some type of macroalgae - just a guess though.

 

[LeslieH]

Yup, a red algae. Your best bet for more information is to post in the marine algae section.