It appears to be splitting unless I am looking at an optical illusion from the reflection of the tank.
More information is needed on your setup. Included time its been running, what is in it for LR, and other inhabitants, water perameters, with specific numbers not just good water, pH, salinity, alkalinity, temp, ammonia, nitrites and nitrates to be more specific. Has it completed its cycle? Also lighting, what type and how many watts. How long have you had the anemone? How did you acclimate it to your tank? It is bleached and its not uncommon to see newly aquired anemones from LFS bleached. Answers to the above will help pin point what could be wrong. HTH.
My assumption looking at the pic is that your tank is very very new, this is prob where your issues are steming from.