Sun coral, non-photosynthetic inverts question

[Rippin]

You may be aware of this already but if you're keeping feather dusters, you will need to feed them to ensure that they survive. Phytoplankton every other day should do the trick.

Sure, there are other types of inverts that can be keep without a dependency on light, but they all must be fed. Scallops and tube anemones are nice but must be fed (and the survival rate of those in captivity are low, from what I've read).