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Help Identifying growth on frag


Carpathian

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I recently received a frag of Candy Apple Zoanthids, but there is something attached to this that is growing. I have attached a photo that was taken when I recieved it last week. Where it looks to be broken off at the top of the "fin" is now grown out and shaped like a complete "fin". Can anyone tell me what it is. It seems to open and close slightly throughout the day like a clam.

 

Thanks!

post-2635857-0-21040200-1426782473_thumb.jpg

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Don't look like candy apples, more like whammin watermelons. Looks like a broken barnicale.

Those are def not CARs.

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Agree that those are watermellons or at least not Candy Apples, and I think it's some sort of bivalve, doesnt seem like a barnacle to me. Either way, harmless

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Looks like an oyster to me; but could be a mussel or similar bivalve.

 

If it were a barnacle, you'd see filter-feeding legs come out and rake through the water at some point.

Edited by braden
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I had a barnacle kill a coral. They grow bigger and will crush anything in their way.

Using mixed salt or natural sea water? I've never seen one live on mixed salts before.

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Appreciate the input from all. After comparing pics, they definately look more like watermelon. Very new to the coral side of this hobby!

 

After removing the "growth" I believe it looks a lot like a muscle. Attached is a dissected view since I didnt want it in my tank. Overall very this, maybe 1/8" at its thickest.

 

Again thank you all for the help!

post-2635857-0-60078300-1426807002_thumb.jpg

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Got the coral from reefs2go.com...I guess I should be skeptical of what they are naming them. Hopefully the others are correct.

 

This "muscle" came on the frag.

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If its shell was more-or-less cemented to the rock it was an oyster. If it was attached less permanently, it was attached with byssal threads and it was a mussel or related bivalve. (Flame scallops will attach themselves with byssal threads, too.)

 

Generally, these bivalves are good for your tank. If they're not in a spot you like, they can be relocated safely (if they aren't oysters).

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Appreciate the input from all. After comparing pics, they definately look more like watermelon. Very new to the coral side of this hobby!

 

After removing the "growth" I believe it looks a lot like a muscle. Attached is a dissected view since I didnt want it in my tank. Overall very this, maybe 1/8" at its thickest.

 

Again thank you all for the help!

Oh no, dont remove things like this. The biodiversity is amazing to observe and so positive for the tank.

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