What is this?

So far it's only been out only at night.
Would ChromoPlex be a good food?
If not what do I feed it?
And is ChromoPlex good for coco worms or mushrooms?
 
The white ball corallimorphs will usually show better growth on chunks of meaty foods rather than fine foods intended for filter feeders. I used to feed mine bits of popcorn shrimp, fish, or mysis depending on what my other animals were eating that day. You can also train them to be open during the day by moving feedings a little earlier each time.

Unfortunately I can't help with chromoplex as far as the worms and mushrooms, since I have never kept coco worms and never tried filter feeder foods with mushrooms.

(Edited to fix a grammar goof)
 
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