Comanthus comatula, crinoids, featherstar.
The are also very fascinating animals.
They walk through the tank and every day i see them on a different spot.
Makes evry day a sport to look them up.
They are filterfeeders and not recommended for novice reefers.
Most keep them a few weeks, at the most 8weeks.
It seems feeding rotifier can extend their live in our reeftank . This tip i got from Tim Wijgerde phd.
I have kept them up to 10 months before in my reef. Some I kept one year already in my dymico system.
Before without rotifier..
So we will see what feeding rotifiers will bring us in the future.

Happy Reefing, GlennF