Thanks to Wade, I have had a small supply of asterinas to feed my harlequin shrimp. After adding a bunch in the main tank, I saved the rest in my 'fuge and now feed the shrimp a star once or twice a week. He goes crazy when I drop it in, and I can often get it close enough to watch him grab it within a minute.
I am going to attach a (very) fuzzy picture of my feeding the shrimp today. The red circle is the small star. Sorry for the quality. I took it in a hurry and the camera isn't that great.
As soon as he grabs the star, the shrimp runs off to eat it.
I would like more asterinas, both to populate and to feed. I think I emptied Wade farm, so I need more.