could be, but it could also be hair algae you also have an aptasia in that picView attachment 16699 After 1 and 1/2 years, I am starting to get some algae in my tank. The bubble algae is easy to identify but I am having a harder time with a few others. Is this one a type of caulpera?
this i believe is Gelidium, Red Wiry Turf AlgaeHow about this course algae?
View attachment 16700
the blue looks like a sponge, if it is it should be ok. if it takes over lets say a coral, just pluck it offA sponge or Algae?View attachment 16701