Did you read SWF's description, I coppied it:
The Bubble Tip Anemone, a.k.a. Bulb Anemone, is a very popular Anemone because it readily hosts most Clownfish species.
Their photo of the bulb looks just like your average bubble tip to me.
If you are refering to it's lack of bubbled tips, that is normal, some do some don't have them, normal.