critter id needed

I’ve been noticing these here and there. Didn’t realize they are everywhere at night till recently prob 50+. Move pretty quick for their small size. Any thoughts would be much appreciated!

Good morning all! Rearranging a Zoa colony found this guy. Is it around 2” long. Quite cute the wanker. Is it friend or foe?

I found this on my tank today. Anyone happen to know what it is?

It came on my gsp and jumped off while I was dipping. Should I put it in my display?

Could you please help me id this snail? It was caught off the turkish coast of the mediterranean sea. It seems to be a scavanger, they all gathered around a dead molly or meat but they don't seem to eat any algae. They are very inactive and somewhat nocturnal i guess. Sometimes they randomly...

I have a few critters to ID and I hope none of them are bad. I have supplied a slew of pictures, with no clear meaning or direction. 1. I have a few clear/gray blob things around my tank that are just popping up and I’m not sure what they are. 2. I have a few root-like structures around the...

Found this worm looking thing on the glass? Looks like it survived a dip at some point, very dead now but thinking where is the other 100? Thanks!

Found this little guy wandering my tank glass this morning when putting up some new frag racks for some coral I had coming in. He/she was not one of our purchased cleanup crew. Did our clean up crew multiply or possibly a stomatella snail? Or is it something else that should probably be tossed...

I was cleaning my glass and noticed an abundance of these small Star like critters on my glass. They’re tiny - like a thin point to a lead pencil. To my eye they look like 4 pointed or Star shaped, but my phone was able to take a pretty detailed photo. Here are two different ones. ‍♂️ curious...

I had a friend that is getting a new tank, so had to get rid of a lot of his corals. Some of his zoas have feather dusters, which I’ve heard are healthy for a mature tank. These pink cat eyes are the only corals that have these. They’ve been in my tank for about a week and have now popped up...

Hey guys! My friend found this weird critter in their tank and we have no idea what to ID it as. Looks like some type of worm. Unfortunately there’s no pics of it in the water but I’ll attach a couple of pictures from outside of the tank. The spikes along it move almost like an urchins spikes.

I have this squishy translucent sponge like thing growing on the side of this coral. On the top, a bit to the right of center, is a small tube with two small translucent white tentacles coming out of it. You can only see one tentacle in the photo. The large cut on the sponge thing is from me...

Let me know if you need better photos. These keep multiplying and I’m wondering what the heck they are. They are little white pills that have been very very slowly move and quickly multiplying.

New here.. tank is about 7 months, have some torches, fireworks, hammers, and xenia. Tank is in recovery stage from velvet that wiped out all fish but 2 which are in copper QT. Found some aiptasia on larger firework frag and took it out to grab it off and super glue. These tiny quick, shrimp...

Hey guys just a quick question. Monthly, I add @AlgaeBarn ecopods. A couple of months ago I used one shipment of the Galaxy pod mix. Today while feeding my corals, I noticed in my chaeto overgrowth box these little (1/8 inch?) critters. I've looked around at some pictures but I can't seem to...

So I noticed yesterday that my galaxia coral had what looked like bubble algae on it so I took out of tank and got it off and then noticed this creature that looks like a Rolly Polly gliding under the plug . It has a hard grey shell that has some dark markings on the front and back of shell. It...

I’m not sure how this works but it looks like I have baby somethings all over the place. This was filmed last night. This morning there is no trace of them but I’ll keep you posted if they’re back at night. The only thing they can be is baby crabs as I don’t have 2 of anything else in my...

Hello, we got an aquacultured coral several months ago. We dipped and scrubbed it and tried to remove any pests. However we have found these structures growing on the bottom of the mount, it has spread to around the mount. They seem to be light sensitive and will get larger at night time, and...

Woke up today and noticed 6 or 7 of these on glass. Never seen before. Hope that the photos are clear enough.

I have all of a sudden noticed a large amount of white critters on my rock where there’s algae and on my glass when the lights have gone out. I’ve dossed copepods before however they never looked like this ... Any ideas many thanks. please see images below tried to get best images in...

Hello, I think these might be acoel flatworm, I am not sure if that is correct. I am wondering if I should be concerned about these tiny guys.

I hunted around the hitchhiker and critter I.D. forums for a while now and haven’t seen anything like this, if it’s there and I missed it I apologize. I turned off the blue light for this picture, critter in question is to the right of the little gsp clump. Antler looking thing started from...

Was chilling in front of the tank this morning and observed some spawn being released. At first I thought it was brittle stars spawning which I’ve seen them do before. When I looked closer I saw a small round critter, with antenna, and these two pink protrusions where the spawn was being...

this sponge just kinda…. Appeared? any ID on it? Is it harmful to my reef? I’ve been reading mixed information on it. Thanks so much! And have a wonderful day (Sorry for low quality image)