What's this on my LR??

[Kalib]

Hopefully the pics turn out fine and they aren't too big

Anyway, i believe that the thing on my LR is indeed some sort of anemone but i can't seem to ID it. Yesterday when i first noticed it it was just a round thing(closed up) on my LR. Today, it opened up and is seen wandering around on the LR real slowly. Hopefully, someone can shed some light on it and tell me if its a pest or not.

Since we're on the topic of identifying stuff, what's those greenish algae on the LR?

I've circled both the algae(in green) and the unidentified creature(in red).

[FuEl]

If it starts budding you can kill it with a lethal injection of calcium hydroxide.

As for the algae...I would leave it...nothing to be worried about..

[Kalib]

Ahh i see. but anyone can ID what exactly it is? tried searching on the internet but can't quite seem to ID it with anything.

So the algae....Anyone know what is it? ahha i've got problems IDing that too.

[hongqixian]

The anemone is Anemonia majano or a similar species. They are beautiful(sort of like mini bubbletips) but tend to be pests as they sting and spread quickly, though not as bad as aiptasia. They can be more easily dealt with. Sometimes sold in colonies in LFSes on rocks.

The algae is Neopencillus sp or Pencillus sp, something like that (i remember seeing it in the Guide to Singapore's Coral reefs/Seashore. A nice calcareous algae that doesn't really last long.