Help identifying it please

[fegoulart]

Hello,

After one month that I have bought my first and only coral (candy cane) this "flower" appeared on my rock. (Purple dot on photo)

I am a total beginner . That's my first reef tank. It has 300 liters

Can anyone help me finding out that it is ?

 

[Reeferman47]

From the looks of it it could possibly be aiptasia, but I cannot tell. Can you take a better pic?