Berghia Nudibranch. Aiptasia Nemesis?

Twice now I have purchased berghia nudibranchs. The first time I acclimated them and placed them in my reef tank. I never saw them again, I even waited seven months before determining that the nudibranchs were more than likely no longer alive.

From the reading I did prior to my purchase, I found that once placed in a reef tank, the hobbyist is unlikely to see the berghia again. A dwindling aiptasia population should be witnessed however.

But, my first attempt didn't work out as hoped. I recently took another stab at it. This time I ordered a number of berghia nudis from Berghia Direct, and after acclimation they were released into a 75 gallon tank that doesn't have anything but a shallow sand bed and some live rock. There are no fish or other potential predators.
The tank does, or did, however have about 100 average sized aiptasia anemones, so I felt it was an ideal tank to set them free in.

It has now been little over two weeks since I received them and the tank is already almost aiptasia free. One of the next days I will begin moving the berghia into my reef tank, and then cross my fingers.

On the first day of having the berghia in my 75 gallon refugium, I was lucky enough to find one of the nudibranchs eating an aiptasia anemone. So I set up my camera to take a picture every 30 seconds.
An hour later, I returned to find the aiptasia gone. I took the pictures and stitched them together into a GIF animation.
You can see the GIF by clicking here. Be warned however, the file is almost 30MB and will take some time to download.