worm id

Saw these small white worms in the live rock I purchased. This is my first tank, the rock was not dipped after picking it up from my LFS. Just wondering if this is a pest or something that is not harmful. There are no fish or coral in the tank and has been cycling for 3 days now. Should I be...

Hello, I need help on an Id of this critter. at first it looked like a nudibranch when I saw it posted up on top of my rockwork. after fishing it out of the tank I can now tell that it has a bunch of long streamers coming off of it. Sorry about the doo doo iPhone pictures.

I just added 2 banggai cardinal, a YWG, a green mandarin goby, a blue hippo tang, and a flame angelfish from DR Reef's quarantine fish to my 200 gallon reefer xl Unfortunately the flame angel, one cardinal, and the YWG all died within 3 days. Water parameters are normal and the other fish are...

I got 20 pounds of live rock that came with a ton of cool mushrooms and I put it in my qt this morning when it was still dark I saw this caterpillar looking creature that is red with white spots and horns I've looked for hours what it could be but I haven't matched a picture yet can you help...

HELP! I bought a 20 lb live rock that came with a bunch of mushrooms and than this morning at around 5:00 am so the lights were still off I saw this red and white creature come out looks almost like a caterpillar and has spikes....I tried to identify it but I can't seem to match the picture with...

i just got this shipment of corals in and these hitchhikers are in the bags please help identify almost looks like bristle worm but want to make sure and will dip kill these

Hi All, I am hoping someone can ID this guy. It came off an elegance coral that was in QT. This was the coral's second dip, so I am assuming that there was an egg that I missed when cleaning it the first time. Any help would be appreciated. Thanks

Found these worms in high concentrations in my coral tanks - not sure what they could be and need an ID! Thanks! Not sure if it’s a type of flatworm? Finding them on tank sides and other surfaces but they don’t seem to be on the corals. They move quickly as well - hopefully the attached video...

Bought Marco rock right away I put it in the tank, got 2 coral from Petco: mushroom and Kenya tree after a month in the tank with 3 fishes I ordered more Marco rock to start aquascaping I think is called, break the rock and redesign it, so the new rock came I broke it and since it wasn’t enough...

Over the course of the last couple of days, my spiny box puffer seems to have a worm over his eye. Would a freshwater dip help rid him of it? Any other suggestions as to what to do? The tank is a 220 predator FOWLR. There haven’t been any new additions to the tank for about a month. Water...

Any idea what this thing is? Found this one on the live rock - have also found a couple on the edges of the glass. Its a long white worm that kind of coils itself like this. Originally thought it was the zooanxthellae released by my hammers but after seeing this one changing that assumption...

My tank is fallow right now and with no fish around, I decide to focus more on the tiny things around the tank. I am seeing 3 creatures that I am not sure what they are. Whatever they are they are all over my tank, one grain of sand can have around 6 (yellow line) every spot you see in the sand...

Hello everybody, I just purchased a zoa and upon cleaning it prior to introducing it to my tank I found this critter. Does anyone know what this is? I have more photos and a short video if needed. I am keeping it in a separate container for now. It looks menacing and certainly not shy, makes me...

Found it in my sump on bottom, length is about 1 inch.

I was just cleaning out my filter sock and I found around 4 of these things I don't know what they are, where they are in my tank or how they got in there? But looking at their spikes I might come to an assumption they killed 2 of my fish a lawnmower blenny and a cleaner wrasse. Both of the fish...

I have these strange thin red/pink worms on my glass and they just have appeared from nowhere. I do not have live rock and all of my corals have been dipped. Please help me figure out if these are good or bad. Here’s an image -

Saw this while feeding my invert heavy tank. It is most definitely NOT a bristle worm… I have several of those in my tank and know them fairly well. This guy has a face that reminds me of a coolie loach… i think it’s been in my tank for at least 8 months. It seems to be more of a rock dweller...

Hello, I just want to know if I should be worried about this guy and if 'you see one there all lots' kind of mentality. I looked quite a bit and did not come up with anything. Please let me know!

Saw this a minute ago and was able to snag it with some tongs. Anyone know what it is?

Is this a spaghetti worm. If not can someone please identify?? Was found on the glass of my tank last night

Hi all, This was sold to me as a “mini” black cucumber; the mouth seems strange though. Anyone know what this is, and if it’s reef safe? Main goal is to turn over my sand. Almost looks like more like a worm than a cucumber. I’m holding releasing it before I’ve got a firm ID. Thanks, Adam

Found 2 of these in my tank. Caught one. Haven't ever seen anything like it before or find anything online since finding it in my tank. Moves like a snake or eel. Redish color with white spots. Anyone have a clue what it could be? Please help. Thanks in advance

Hi, Any ideas what this is? Edit: I'm pretty sure this is a red flatworm but would still be good to get confirmation from those who have seen these before. This image is the largest one but there are plenty others on my glass. Thanks for your help! (My tank has Trochus, Tectus, Cerith snails...

So my wife had me clean and move a bookshelf on the side of the tank today and I've been enjoying a view of the tank I haven't had and noticed the sand bed was pushed up on the glass. Low and behold I see worms in the sand I don't recognize. I'm terrified for the worst ID possible, but I can't...