Saw that too. I battle one popping up every once in a blue moon, but definitely couldn't get close to needing a berghia.I don't have any aiptasia but if you do
Thread 'Berghia Nudibranch Giveaway: Show Us Your Worst!' https://www.reef2reef.com/threads/berghia-nudibranch-giveaway-show-us-your-worst.964867/