What is this stuff

[iseeweed]

I have noticed this green, fan looking algea a couple of months ago. It seems to be spreading. It looks kinda cool, but just wondering if it is good/bad???

 

[Anonymous]

I would agree that it is some kind of algae. I would pluck it off. If it spreads it could choke your corals.

 

[mr_X]

Acetabularia; Mermaid's Cups, are comprised of a long slender stalk capped with an inverted cup. These can be sensitive, getting easily beat up in collection/transport. These are about a quarter inch across the tops... in the Bahamas

is this what that looks like? i can't see it very well.
or does it look like:
Udotea are fan-shaped algae, 3-8" in height, they and the Pine Cone Algae of the genus Rhipocephalus have the same care requirements as Halimeda. Some young Udotea in the Bahamas shown.

http://www.wetwebmedia.com/maralgae.htm

 

[Anonymous]

They look like Merman's Fan to me. We are talking about the same thing, right? :?

 

[iseeweed]

from the pics on the web, it looks most like the Udotea to me. I used to have a bunch of sargasm growing from the same place. After 6-8 months the sargasm went away and this stuff popped up. I will try to get a better pic., as my camera is very sub-par. If it is Udotea, should I let it grow???

 

[mr_X]

i wouldn't be happy with any macro in my display unless it was extremely slow growing, and BEAUTIFUL. :wink: