First post is this normal on a hammer?

MJV15

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So I’m recently returning to the reef tank world after a 15 year break. I’ve been a fan of R2R for months now and have just been hesitant to make an account for what ever reason until now. Saltwater is not new to me but keeping corals is, since I previously only kept anemones. I love the way the anemones away in the water so I’m naturally draw to hammers, torch, and the like.

Here’s my question, I’ve had this hammer for about two months it has always seemed happy, opens up really nicely every day. About 2 weeks ago I noticed a fuzzy offshoot coming from the skeleton and figured it was maybe a new start. But now there are lots of them an I’m worried it’s a pest. I’m hoping some more experienced folks might be able to help me ID what is going on.
1F748A8B-F2D0-4DB8-BF42-23192952A74A.jpeg

Tank facts
90 gallons
Ammonia-0
Nitrites-0
Nitrates-2 (has been that way for months)
Ph-8.2
Phosphates-0
Calcium-410
Magnesium-1320
Alk-7.8
PAR-80
It’s in a lower flow area of the tank

Any thoughts are greatly appreciated
 
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Peace River

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^^^^^^
What they said! Welcome to R2R!!! :)
 
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MJV15

MJV15

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I’m pretty sure those are pineapple sponges. These are harmless filter feeders. They appear and disappear as nutrient levels in the water column fluctuate.
and welcome to r2r!!!

Awesome, thanks guys
 
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