pest id

I am almost certain this thing was wild caught. Riddled with barnicles and now this weird thing. What is it? It popped off pretty easily, was a purple calcification with a surprise under it.

I have whatever these are on my sandbed and they are everywhere. I already posted this on macks dinoflagellates group and was told they dont know what they are... this was taken at 250x zoom. Anybody seen or know what these or are they are toxic and possible treatment?

Hello everyone and welcome to this little microscopy thread! Many hobbyists stumble upon microscopes once they are dealing with a pest they can't properly identify any other way. Besides their obvious usefulness when dealing with a problem, microscopes grant access to a whole new world many...

I have most of my inverts in QT at the moment and a few snails have died, probably due to crowded conditions in there the past 6 weeks, but before I return to DT I was wondering if anyone knows if this is normal or a parasite of some type. Many of the snails have tentacles sticking out from...

Found one on rock found one on a dying coral. They are fairly small with the larger one being a little over 1cm maybe.

Hi all, Does anyone know what this could be? It’s spreading quite aggressively and seems to irritate my corals. I’ve looked around but haven’t found an identical ID yet – to me it resembles colonial hydroids or possibly majano anemones, though I’m not certain. Thanks in advance for your help!

Finally got around to breaking down a 10g tank that has been sitting around for about a month. And found these weird 8 legged jellyfish-like creatures bopping around. Anyone have any idea what they could be?

Hi guys anyone can help to ID this white worm? No idea where it came from. Should I remove it?

I went on a trip to Vegas about a little over a month ago. Brought home a new torch. Dipped it, put it on a new plug, and put it in the tank. A few weeks later, I noticed these on the glass (I'm assuming this torch is what they rode in on). They're VERY small. About the size of a 0.7 or 0.5...

Would anyone know what species this worm is? I want to know whether i should kill it or release it back in the ocean. I found it while washing some rocks found on the Jersey Shore. Thanks in advance! :)

Hey Guys ! Can you tell me what this is and if it’s dangerous? I’ve already scrapped it about a months ago but it came back, it looks like feeder worms but not sure

Caught me off guard when it started swimming. Thanks in advance

Hello - posting the attached to see if I have the dreaded fire worm. Very hard for me to tell. They appear to have red fronds at the base of the bristle bunches leading me to believe they are in fact fire worms. Greatly appreciated!

There are two small tentacles sticking out of my goniopora, when I try to grab them with a tweezer or get anywhere near them they retract… I was reading it could possible be a spionid worm? Shoud I be worried ?

These eggs came with a frogspawn that I picked up from my Lfs today. I removed them with a knife and their texture was tougher than expected, almost like silicon, and they were attached pretty well. Anyone know what they might be?

I posted this previously with some crappy photos. I finally got my phone to focus. I will be editing the old one also but I hope this gets some traction. Have had this white fuzz on my rocks and i have a feeling it killed off my hammers and it's moved it's way to my zoas. In fact the only hammer...

Anyone know the species ? Saw them walking all over a few mushrooms (these guys are same size as tisbe pods) I also saw them eating dinoflagellates (can only see them under strong magnification) One of the mushrooms was closed for a few days - upon inspection noticed these white bugs crawling...

Purchased some live rock from a tank breakdown. Was going to boil it but had a spare tank and thought why not, let's see what happens. Day 1 this guy sprouts. Any idea what it may be? 34 years off and on saltwater aquariums. Planning on using in a coral only tank.

Found this little guy making trails through my sandbed, it's no more than 5 mm long, has two eyes and mandables, as well as front grabbers that resemble what a shrimp has, and then the rest of its body is long and shrimp like. I'm hoping it's a type of pod, but I'm worried it's a bristle worm...

Are these amphipods or something else? There has been an explosion in my tank over the last week or so, they are all over the tank and sump. https://share.icloud.com/photos/0f5w9F-iFzBHAAxsTp4Al_PmA https://share.icloud.com/photos/07fg7Vgaf2gW2mb5Bkdf6k4Pg

Hey! Tank has been up and running for about 5 months, so still a bit new to some (a lot) of things. Have seen these guys skulking in some of the rockwork before, but never out and about. Just tonight was alarmed to see them crawling all over my hammer. Managed to grab a couple out, but still at...

These clear "tube" critters have almost completely taken over the rear chamber of my nano AIO. They're growing and attaching themselves to the glass, heater and temp probes. I've also started to notice them growing on the rock in the tank as well. They seem to soft tissue and not hard, they also...

Discovered several of these on my rocks which i think are some type of snail. Had a couple of frags one one side of the tank die the past couple of weeks so I’m not sure if this may be related. Any thoughts?

Can somebody ID this worm? It is under 50 magnification. The two pictures are two different but the same. They look like bristle worms but very small. It came out of one of my large goni that has been receding over the last 3 weeks.

Coral Only tank, no fish/inverts. Any idea what this little tentacle is? I recorded one of them but I see 2 short ones and 1 slightly longer one. If a pest, any advice on how to remove it?