unknown critter

Hey Everyone, Recently was doing a deep clean as I was getting ready for 65 new frags coming in from a wholesaler for my new business. As I was deconstructing some of the live rock formations, I found this little guy below swimming around... At the time, only my 2 breeding mocha clown fish...

Help!!! Have something on my snail shell? Any ideas!?

Wassup Reefers, found this tiny orange legged crab hosting in my elegance coral today. Anyone have any idea what it is or if it’s bad for the corals health?? Thanks in advance!

Hello, i noticed these white circles all over my rocks, does anyone know what these are? and if they are harmful..

I saw this thing crawl out of one of my rocks during coral feeding, I swiftly took it out but am concerned on what it is please help I.d this thing for me ,thank you.

saw this little guy in my tank and immediately got him out. have no clue what is is can’t find anything about it. moves almost like a jellyfish???

Hello, Yesterday I noticed these things, marked up in the image, in my tank. I tried poking them and they close up and retreat to the hole in the live rock. Can someone identify them? and tell me whether I need to do something about them? N.B. I always dip my corals in Seachum dip, and I don't...

I noticed some white hair like things coming off of my cleaner shrimp today (see photos & video). You can really see it protruding from his legs and tail. Does anyone know if this is normal? I'm afraid it might be a parasite or some sort of sickness but I cant seem to find much information on it.

My tank is currently fish-less due to ich and going through a phase of dinos (talk about struggling.) today I noticed a small green creature on the live rock. Thinking it was a nudibranch, I captured it with a pipette. Upon further examination, I realized I had no idea what it was. I found...

Is this something to be concerned with? It this more than one worm? Its about an inch and a half in length. I've never seen anything like it, any info or guesses would be greatly appreciated!

Can I get some help identify this little snail

Hi everyone, I have a identification situation i need some help with. First, I want to introduce myself. My name's Alissa, and I'm from Michigan. I was in th reef hobby for a few years. For 3 years I had a 65 gallon deep sandbed reeftank that I set up in a way that I only had to do fresh water...

So I was observing my tank and to my surprise I ran into something very strange that caught my eye. It seems to be a type of snail but without a shell. This “snail” is a little smaller than a dime. Help would be appreciated! It’s kinda creepy! *See images below*

Hello, a friend of mine has a setosa and would like to know about these little antennas sticking out of the coral. They move in the flow and retract on contact, like a feather duster. Are they any reason to be concerned or to dip the coral? Could they cause the polyps to not extend fully...

Noticed this little guy crawling on a piece of monti cap. Don't recall ever seeing him before and just curious if anyone can help ID as good or bad!

Hi. These recently appeared in my sump. They’ve been stationary but I cannot figure out what they are for the life of me. They’re a clear/whitish color. Any ideas?

Hi folks-- I found this on my DT glass one night--is it safe to have in my reef tank? Is it some sort of conch? I also wonder how big it will get? Thx much in advance for any help!