Aqua dome is correct. The feather is smaller than the picture, about baseball where it is pictured about softball size. when introduced intially a tank they go through a drastic adjustment phase for the first 2 to 3 weeks. During this phase they drop partial and full limbs and to adjust to the limited space in your tank, a large percentage perish not able to cope. Only when you start to see regrowth on the limbs will know know they are starting to stabilize. Sock filters can not be used because the feathers sift the detrius that returns to the tank. I stir my sump once every day or two. He has positioned himself directly under a return to capture and feed. The transition is not easy and they require very small food particles such as coral frenzy, then cylopeeze, and up as they acclimated over two months. Yes I have seen brine being taken into the mouth.
Frozen brine and dry nori are all I currently feed my tank. A lot of people have experience with Crinoids, few have been successful but the very few of us who have done the research and dare to test the waves have shown positive results. As always however I welcome all feed back in the general reef keeping topics I have already setup (listed above), this is a sale forum.
In short this guy would not be alive if he had not been eating for 4 months.
By the way Aqua Dome is in my top 2 stores of the whole area and I love it! And in no way would I ever knock a kick *** store like it!