Anemones are weird, I had a long tentacle one what would close up around 5 o'clock each day for a few weeks, He was a very strong one he was about 9 inches wide and one day a bit of the white powder, rock chunk that accumulates on a bottle of alkalinity feel near him and he grabbed it with his tentacle, ate it then shrunk to the size of a pea. it was amazing, He lived after that and got a strong 13 inches across.