Help ID weird polyp found in sand

Formulator

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Not sure what this thing is. I’ve removed it to a quarantine container for now, but not ready to flush it… looks kind of cool. It was in the sand near a large-ish favia colony. Baby sea cucumber/apple? Something more nefarious?
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vetteguy53081

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Not sure what this thing is. I’ve removed it to a quarantine container for now, but not ready to flush it… looks kind of cool. It was in the sand near a large-ish favia colony. Baby sea cucumber/apple? Something more nefarious?
IMG_5460.jpeg


IMG_5458.jpeg

IMG_5470.jpeg
This looks to be a ball anemone. They remain small and here is a puzzling fact as others stated they are a good anemone. Anemone ???
Ball Anemones are actually not anemones at all, it is actually a mushroom coral that is commonly confused by too many as a Majano Aiptasia. Unlike an Aiptasia, they are reef safe, they commonly stay closed during the day and open up at night. The tips if its anemone-like tentacles end with a ball tip giving it its' name
 

ISpeakForTheSeas

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Friend or foe?
Yeah, that's a Corallimorph (A.K.A. Ball Anemone) of some kind - Corynactis is one of the genera in the family.

They're related to soft mushroom corals (they arguably are mushroom corals), and they're generally harmless (at least the kinds we get in the hobby), though some species may reproduce pretty quickly in aquariums. A lot people keep them because they're neat little critters.
 

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BristleWormHater

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Thanks all! I have decided to return the ball anemone to my display. Cool little critter!
Man I've been wanting one of those so bad ever since I saw these at the Tennessee aquarium. Lucky find! They are predatory, but at that size I wouldn't worry about it unless you have really a really small fish or curious invert. 20240817_160555.jpg
 

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Man I've been wanting one of those so bad ever since I saw these at the Tennessee aquarium. Lucky find! They are predatory, but at that size I wouldn't worry about it unless you have really a really small fish or curious invert. 20240817_160555.jpg
A great way to ID these is the massive lips lol
 

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HAVE YOU EVER KEPT A RARE/UNCOMMON FISH, CORAL, OR INVERT? SHOW IT OFF IN THE THREAD!

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