White spikes on coralline algae

jujumaster89

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I have some spots on my purple month that have been overtaken by coralline algae I think. At the perimeter of the corral one are these odd white spikes. Any thoughts on what this is?

2C7223E1-4837-4DC6-B653-4E21E61513CE.jpeg
 
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jujumaster89

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It may also be happening with my lepto. Look at top of drag where it was starting to encrust into the rock.
 

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mikereefing

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Looks like Vermetid Snails
I think so too...OP do you see these "white spikes" anywhere else in your tank? I have a vermetid infestation that grows on my coral skeletons and under rocks. I go in with my bone cutter to nip the snails at the base.
 
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jujumaster89

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Ugh. I was about to say I used to have them... but I know better. The large ones have long ago been encrusted with coralline algae. Could that explain this weird growth pattern just above this new acro?
 

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You can see an example of the snails that have grown over below. They are much bigger than these new guys
 

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