Porites Nudibranchs

I thought I saw a familiar shape on my new Porites coral. Since it was so small, I didn't want to believe my eyes. I just wanted it to be a piece of debris or maybe a small bit of scallop DIY food. Then, a day later and early in the morning, I saw a very large (relatively speaking) Nudibranch. So, I immediately isolated the coral/zoanthid combo rock to the refugium. There, I used a pipet to loosen and remove about 8 adult Nudibranchs. After the battle, there were cerata everywhere. I'll have to keep the coral under watch for several weeks until I remove all the Nudis and their offspring. Another idea is to use a Waterpik to help hose them off.