hitchhiker

Anyone know what this is? It glows fluorescent orange under blue LEDs. I noticed it growing on my live rock recently. Doesn’t seem to spread or grow very rapidly. Is it a cool hitchhiker or something I need to remove? It feels almost like an anemone between my fingers.

I just found this molt on the rockwork of my aquarium and I realized I have never knowingly put a crab like this in my tank. Does anyone know what kind of crab this is? It's barely the size of a dime. I tried to ID it using Google search by image and I kept getting either large Land crab...

^ Top view ^ Bottom view What is this hitchiker? Looks like a fireworm due to the glass hair spines but its too short to be one and the belly looks like a suction cup type deal similar to abalones

Found little isopod-looking guys in my Chaeto as well as on my live rock. They seem to come out at night. They look too big to be copepods... so what are they? Should I be worried?

I got some snail hitchhikers in a plant and I was like ok kinda cute I don’t want to kill them and now in the snail tank there’s a bunch of these stringy worms suddenly . I’ve looked through a lot of these threads and I’m not seeing any pics of the same worms I have. They are very microscopic...

Noticed this patch of zoas tonight after a herm ran them over. Seems to be quite a few only on this portion of the rock growing all around the base and stem of the zoas. Any ID help would be much appreciated! Thanks in advance!!

Hey guys, hoping someone can identify this clear flat worm like creature I found in the back chamber of my Biocube. It hitchhiked from Tampa Bay Saltwater Live rock/sand. It looks like it has a skeleton structure, is extremely sensitive to light, as is super fast moving.

Have a few hitchhikers, some of which I’m (oddly?) excited about, feather dusters, bristle worms, possible spaghetti worms? But have a few more than I’m needing some ID on! Clear translucent tubes, Neon orange spots on multiple areas of rock, and the green plant looking algae? Also can’t...

Hi guys. My tank has been running about 3-4 years now. I haven’t seen these worms at all really. In the past few months their population has increased rapidly. Are they bad? I’ve had a few polyps die off on my LPS, but that could be from something else. Are these things bad? What are they?

Hard, tiny things all over zoas. They come off as strings when pulled. They do not seem to move at all. Among them was a small grub like animal that was ~2mm in diameter and had a see through body. It looked like a tiny shrimp, I could see two black eyes. Wasn't able to get picture. Also, red...

Does anyone know what this thing is? Should I be worried?

Hey guys, just recently started a 5g fluval all in one.(first saltwater attempt) it’s been running for nearly a month and a half. I’ve got this torch coral that was doing great for a while then started acting weird. Just not fully extending some polyps shrinking and becoming fat and stubby. I...

Hello everyone, recently I got a candy cane coral, I haven't noticed anything unusual until today I noticed what looks like a small tentacle extending out of one of the mouths I haven’t seen never seen this before. Just wondering if anyone has experienced this… below is a link to a short YouTube...

Hey guys I found this Mantis shrimp at the bottom of my tank. Does this look like a molt to you or the shrimp itself? Thanks !

I had two of these guys hitchhike in off a tube worm shell. I think it is a sea star that is maybe missing a leg or two? So far they seem to not be causing any problems but I'm not sure if they will down the road...

Just noticed some little additions that I hadn’t seen before. Does anyone know what my little hitchhikers are and if they are dangerous? Thought maybe Asterina, not sure what the others are near my mushrooms thanks in advance for any help!

This is a whelk correct? (trap door & pattern on snout)

Does anyone know what snail this is and if it’s considered reef save? Have it roaming around (only on the rocks) for quite a while now.

Just dipped a new Trumpet Coral with some CoralX and found these two 'lil creatures. Any idea what they are? 1) 2a) Assuming Front part of body 2b) also, assuming this is one creature unless it's two. But this would be what I'm considering the non-front part of one creatures - almost...

I just got some new live rock from another hobbyists tank and found these worms. Anyone have any idea what they are and if they are harmful?

Good afternoon all ! I added a Coraline encrusted clam shell to my tank when I started it at the beginning of the year. Over the past few months, some feather dusters and sponges appeared - along with these colorful guys most recently (see pics). At first though I may have been lucky and got...

Hi there, Does anyone recognize what this critter is? The biggest one I've noticed is about the size of the tip of a pencil, its body is similar to the shape of a lightbulb with 8 arms when it's suspended in the water it kind of swims like a jelly fish. The image attached is how it looks when...

Picked up some Aussie rock and when unwrapped this guy shot out. Is this a bobbit. And do I need to worry about eggs? It’s about 4in long. Don’t try to bother you guys much but a bit nervous.

Hello, First time poster here. I'm having trouble identifying a hitchhiker that just showed up on my trochus snail within the past week. No new additions to the tank in a month which is part of my confusion. See attached photo but they look like white fuzzy cones. Any clue what this could be?

Looking for any input on what this glass clinger is. Not sure if it is a trail remnant or a “live” thing? Such an odd skeletal shape. It just appeared one day on the glass (three days ago) and the same day my cleaner shrimp disappeared and hasn’t come back. The glass clinger hasn’t moved at all...