worm?

So I found a couple of these feather duster looking things and was wondering if anyone had an idea what they are and if I should be concerned? Hopefully they’re just some free filter feeders that will benefit my tank instead.

^ Top view ^ Bottom view What is this hitchiker? Looks like a fireworm due to the glass hair spines but its too short to be one and the belly looks like a suction cup type deal similar to abalones

Does anyone know what this thing is? Should I be worried?

As the lights dimmed and turned off I noted 6-10 of these worm start to come out of my live rock. Over the last few days I had 2 Acropora de- polp. I have checked my water parameters an all are good. Ammonia-0 Nitrate- 0 Nitrate- 3 Ca-446 Mg-1380 Salinity-1.027 Phos- 0.11 added mess bag of...

Hi all, a few days ago i noticed some weird bumps on my torch coral skeleton… i thought nothing of it until the emerald crab i tossed in (who likes to hang out under said torch) has what looks like it on his carapace as well… i cant tell if it’s spreading on the torch skeleton itself. i spent...

Got this live rock with Zoas about a month ago and just noticed this weird worm thing. I found a few bristle worms but I’m just now seeing this. Can anyone ID this guy and tell me more about him

I have a hitchhiker or critter of some sort in my rock. I thought it was a hair algae but it will retract into the rock if I try to tweeze it out. And now I see it coming out more than one hole in my rock. Any idea what this is? Is is safe or do I need to figure out how to destroy it?

So my daughter found this in the QT tank today. Any idea what it is?

Picked up this hitchhiker. When he first came into the tank two weeks ago he was blue and chunky. He moved quickly all around the tank looking for a home for several days then disappeared. I assumed my brittle star or cleanup crew ate him after missing a few days. Then I stumbled upon him...

Hi - I noticed these the other day but thought they were just little snail eggs or something maybe. Didn’t give it much thought but now I have way more on my glass (20+) and saw one moving around on my frog fish today so I got worried. This is the best pic I can get. They are much bigger than...