WTF is sticking out of my fire cynarina

Flow should get it eventually. You can also use tweezers to pull or gently knock it off if you really want. I just let nature do its thing unless it appears to be stuck on the coral after. I changed how that chalice frag was facing, so that the poop didn’t get stuck on that piece sticking up.
 
Huh. You know... I know many corals consume more than just light, but I inherently think of them as photosynthesizers. I do also think of them as "coral animals", but... it just never occurred to me that they'd do any form of waste elimination other than respiration. Of the ones I had many years back, this was not an event/occurrence I ever witnessed or had to consider.
 
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