critter id

Does anyone know what this is? I found this worm just sitting out on the open on a frag tile in the frag tank. Their is now sand and zero live rock. It could have been introduced on a frag plug but I dip everything before it enters this tank. I’m just confused on how I’m just now seeing this...

I’m wondering if anyone can ID this white (not the color it appears in the photo) cluster growth on the side of one of our zoa polyps. It’s solid white and in a circular formation. The edges are made of these little tube things with a hole in the middle of each. Doesn’t seem to be bothering the...

Hi All - I have these tiny critters running around my sand bed. They look somewhat transparent but with a red/brown body. Look to be more walking vs. wiggling and tend to see more of them when I feed. In the attached video you can see them in the middle to lower third of the video. Any idea...

This one I should have taken a picture of while still in the tank but it looks pretty much the same (first pic is the top side, second is the bottom). It was clung to the glass and (with a glove on) I drug it up to the surface and struggled the take it off the glass and it felt pretty...

Hi all, I have noticed a few of these things growing / living around various parts of my rockwork ... And a few more in number than several weeks ago. I think one or a few of these came in on a frag and now I've got quite a few. They protrude maybe 0.25 inch long, and appear to have strands...

My 4-month-old tank has been thru various phases of the uglies that have been relatively mild, but I see a new growth that I'm having a hard time identifying. As shown in the photo, these white fuzzy stalks are attached to rocks (or the back wall) -- the one pictured is about 3 mm tall, others...

Hello, Today I noticed my scoly is showing spiky skeleton and there are two critters ( I think ) attached to it. Is that normal? and what are these two things? Thanks,

Saw these a couple weeks ago. They were on a piece of rock that was mostly buried in sand. They look like they're growing. 2 weeks ago they were just little brown circles.

Recently added coral to my tank and over night I have noticed some white micro bugs on the glass. I dontknow what they are or what I need to do to get rid of them.

Found these tiny critters under my algae scraper, not sure what they are. Does anyone know what they are? Hopefully you can see the video I posted with this.

Saw this in my 90g saltwater reef that was given to be by a friend. Never noticed it before. The tank is 8ish years old has been in my possession for about 6months. Sorry picture kinda sucks, he in the back of the tank under the rocks.

Just wanted to verify if these were fireworms. Found a bunch underneath a clove rock I took out to clean. Any worry with corals or to look out for with more of them?

Good day all, my assumption this is a baby bristle worm but would like a confirmation or a different opinion. Mainly hoping it’s not a B-Word worm! Lol! Thanks in advance!

After searching in here for 3+ hours to identify this, it's time for my 1st post in hopes you can help me figure out what it is :) AIO 28g nano is 2 months cycled, live rock, 2 clown fish, cleaner shrimp currently. Showed itself 4 days ago... Olive Green color, about 1.5" seems to have grown...

Hi everyone. I am new to reefing and I ordered this "clean" algae off Ebay. Long story short it wasn't that clean. Can anyone help me identify what this is?

Hello Follow Reefers, Out of curiosity can you ID this little white transparent critter for me. 0,12 inch / 0,3 cm small round white ish Transparent critter. I have several in my mixed reef and every day I see them in a new spot, which means they’re mobile. Simple question, Thx everybody

Hi there! I found this guy at the base of a monti: Any idea what this is? I am tempted to just take a razor and get it off there. Kind regards friendlyguy

By best guess is a baby flat worm based on images that I’ve seen from other people. Maybe a pod? if not, it’s my best excuse to pull the trigger and get a melanurus.

I’ve got a 37 gallon live rock and live sand only things in the tank as of now is a feather duster, astraea snails, nassarius snails, and a tuxedo urchin. I recently introduced a frag of zoa but I did dip it and inspected thoroughly before placing in tank. I noticed today a little critter...

Howya everybody, Brand new to reef2reef, been reefing a while though, not to savvy on all the little critters in the tank. Current setup is Red Sea reefer 350. ALK: 10.6 CA: 400 MG:1349 PH: 8.25 Salt: 1.024 Could I get an ID on this little guy? They’ve covered the glass out of no...

Hi i have found some if these in my tank and wondering what they are. I have been told they look like hydroids. Any help is greatly appreciated!

I have these white/brown stringy things on a couple of different rocks. It sort of looks like a feather duster but super super thin. Anyone have any suggestions? sorry for the bad photo quality. It’s just hard to capture a good picture of these guys..

Anyone know what this critter is? I have a lot of these on the back wall of my tank and a few on the front.

Happy Super Bowl Sunday! I was getting through some weekend maintenance before the big game and noticed this black object embedded in some Zoas. Didn’t think much of it until I noticed it had little antennas. I’ve never seen a black worm/slug like this before. Any thoughts?