the Anemone will move the Mysis to it's mouth if it sticks to the tentacles.
You really do need to properly address the lighting ASAP. Anemone's appear to do well for a while and then just start going down hill. What is REALLY happening is that they have a very slow metabolism and without proper lighting they just slowly wither. They need significant lighting and very good water quality. Keep on top of your game and up those lights.
Also note that when/if your clowns host is very random. It may or may not happen at all. It could start today, take six months or just never happen. Feeling lucky?
