I did a photo search, and it doesn't match any of the anemonia majano photos I found. They all have solid-colored tentacles. I think the stripes on the tentacles might be a good field mark -- if anyone could tell me names of things with that sort of marking, I can at least do the searches and...
I saw a "new" critter that reminds me too much of aiptasia to be comfy with it, but I don't know how bad a critter it might be. It's about 1/2"-1" tall, with a tube-like base that's about 1/4" in diameter, and what looks like a couple of rows of tentacles at the top. The whole thing is...