critter id

Just woke up this morning and got ready to do my daily zoa growth picture and I found these little guys on one of my frags. Should I be concerned, my zoas don't seem to be closing at all. They're white and have very small antennas from what I can see.

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.

Wormlike things? What are they? New reefer here. Only have zoas, a paly, a Kenya Tree. Saw them coming out of sand after lights were out.

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...

Hi everyone! I have read plenty abo it how bristleworm a are mostly good with the exception of one kind. I don’t think this one is that bad type but I suspect this fella was doing something I’m not too happy about. I have a cauliflower coral right by where I spotted him today. A couple of days...

Hi everyone, I’ve had this nudibranch in since I set up my aquarium about 5-6 weeks ago. I don’t have many corals in the tank yet but he still is lurking in the shadows, I’ve noticed he’s nocturnal. I just wanted to see if anyone knows what kind of Nudi it is and if it may become an issue for...

Just got the coral not even 30 minutes ago and saw this guy crawling around on the bag. At first I thought it was a snail but it doesn’t have a shell and I’ve never seen before. Any ideas? I’ll also attach a pic of the rock with coral that it came on below, I’d also like help in identifying the...

Hi all, hoping for an ID on this or these things. Hiding in my rock. I had a look through the sticky and nothing except maybe hydroids came to mind. You see it move something out of its hold and it seems to be popping out of multiple points in the rock. These were taken during the middle of the...

Hello all just wondering if these are amphipods or something else and should I be considered? There are TONS floating around in my tank and I just saw them tonight after lights out. I don’t see them during the day at all and they’re all just floating about, not on the sand bed at all. They...

I’ve noticed that the Skeleton on my purple bubble has been receding recently ( 1st pic ) and I’ve noticed that white circular thing with a hole in it growing below it ( 2nd pic ) not sure what that is but is it dying? I’ve already lost a green bubble awhile back and I’ve had this one for around...

I found this in my tank a couple days ago. I have been searching for an ID on it since but am still at square one. Any help pointing me in the right direction, or anyone who knows whether it is safe to keep in display would be greatly appreciated. I thought one of my kids dropped a marble in the...

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)

Hello there. If anyone can help identify what this is on my glass. It's not air bubbles. They seem to be swaying and sticking to the back of my tank. Also note that we have added trigger pods about a month ago in the back of our AIO tank. Tried getting a better picture in clearer lighting but...

So I placed an order for some inverts and everything came as requested, but an extra bag was in the shipment and a shrimp I didn’t order. I enjoy all the different inverts, I think they’re mostly fun curious creatures so I don’t mind keeping it. The concern of course is compatibility with...

So I noticed some closed up polyps over the last few nights and I saw these little spots that thought could be sand from me stirring to clean the glass but upon inspection we’re moving. Not sure what they are if they’re bad or how to remove them any help is much appreciated

Hey all, I’m transferring some stuff into another tank and seen this guy slithering? Anyone know what the heck this creature is?

Hi New reefer. Is this aiptasia on our newly acquired turbo please? https://youtube.com/shorts/9e1iWOD-e1c?feature=share Thanks in advance. Iain

I have a lot of white specs appear on my glass. They are pure white and move very slowly if at all. I managed to get a sample under the microscope. I have a few trochus snails in the tank which have been releasing eggs lately after a water change. Can anyone help ID them from the pics attached...

Attached are photos of gelatinous blob found in tank this morning. Sitting on top of some Feather Caleurpa (might not be spelling that right but the green seaweed) there is this white blob, about half an inch or two centimetres in diameter. Tank is FOWLR, emerald crabs, starfish and astrea...

Hey everyone, Just recently set up a new reef tank with some live rock and noticed this little guy. Shaped almost like a virus cell or an egg sac, you can see it has attached itself to the rock with multiple tendrils to hold it in place, does anyone know what this is? Maybe a sponge? If you...

I see multiple things on my glass, my tank was empty for over a month except for all my inverts (no coral just hermits and snails) and I just added some new fish and noticed all these weird critter/things on my glass. Any idea what they are? I’ve had tiny little white worms on my glass for...

Hello guys, I’m new to reefing. Can you help me ID these things; that long tentacles; those white spots on the glass (I think it’s hydroids); these white hair on the live rocks; that thing on the edge of the rock (I think it’s a pineapple sponge). And can you tell me if they are bad or...

Hi All - was doing my usual Chaeto trim and found a couple critters, any idea on this one?

Hey everyone, I found this guy in my aquarium, I took it out just in case it’s bad. Would anyone happen to know if this is a good guy or bad guy for future reference incase I see more.

Hello R2R and Happy New Year!!! I have an otherwise very healthy looking hammer that I just noticed tonight (lights off) has this on it’s stem/base? I’m only about 8 months or so into the hobby and, although I’ve battled some other well known pests (aptasia and vermitids), I’ve been fortunate...