hitch hiker

This little guy popped off a frag I got. Thought it was a stomatella, but thought I'd double check before I keep it. Thanks!

Can anyone ID these? They’re randomly scattered around my rock. They don’t have an obvious shell like vermetid snails. They literally just come out from the rock.I’ve also had vermetid snails in a prior tank and these are different. I’m expecting a similar filter feeder with a stringy/fuzzy...

I recently ordered some frags online and there was a starfish hitchhiker. I’m wondering if anyone knows the species and if I should let it stay or not.

Hey all! I just want to say I really love all the little fun invert critters that are out there. Shout out to Christmas Tree Worms!

I just started my first reef tank a week ago and used live rock to help jumpstart the cycle. I’ve started seeing a few hitchhikers (including an aiptasia, unfortunately) but found this weird little dude. What is it? The most I could find is a tube worm but I’ve seen others burrowed closer to the...

Just saw this fella for the first time today and HELLO it’s long! I thought at first a bristle but it’s pretty flat. Should I be concerned?

First time seeing this one. Must have come in with my sand or something! Thanks in advance!

Found this coral growing on the back of a snail’s shell. Store had it labeled as “ninja star astrea snail”. Quick search resulted in nothing about them being captive bred, and since they’re native to the Atlantic. This leads me to believe the coral is some sort of Atlantic sps. Can anyone chime...

Can you help ID this. It’s soft and I think I can pull it off. Its seems hollow and it’s really light feeling. Not dense. Is it good or bad?

Anyone know what these are and if I should be worried about them

Found these looking at my glass almost looks like a tiny brittle star or some kind of anemone. They’re so small about the same size as copepods. See pics, any ideas?

Picked a few items up from Marketplace. It came with a frag. I was in the middle of moving and with the ongoing "Unknown" , We kept it inside a container at the bottom of the refugium. It has spent a few months there. We just moved, setup the tank, and now i'm trying to figure out what to...

I messed up. I should have bought the quarantined trochus snails from algae barn. My fish store had some in so I purchased them. I noticed they had little bits of hair algae growing on them but weren’t too bad. Anyway, I mistook some hitchhikers for part of their shells. They created a tube...

Just got some trochus delivered and a few have some nice clusters of im assuming hoof limpet maybe someone can help confirm for me?

these fleshy things have been growing on a piece of live rock that came from an lfs. The rock has only been in the tank a little over a week. They haven’t spread but appear to be getting bigger! What are they?

Never seen one quite like it anyone can ID it came in on live rock rubble it moves , it has two small holes on each end - it is soft and squishy like a slug / snail / anemone and I have seen it squirt once or twice - looking to figure what it is if NPS or a pest or a fish eater Also anyone...

Anyone know what this is? LFS owner and I have been watching it for a week and have no idea, when it open fully, it gets out about an extra quarter inch. No tentacles or anything. It also reacts and will retract when touched

Hello everyone, I received some corals today from Austin Aqua. 2 of the corals had the critters in the he below picture on them and they came off during the coral dip. I think they are brittle stars or serpent stars. Any help would be appreciated. Trying to decide if they should go in the tank.

hi ! i’m new here and to marine aquarium keeping in general. I ordered some macro algae and the Ulva I ordered came with this lil guy and pieces of him all over it. just wanted to know if this is a bad, good, or neutral hitchhiker ?? any tips and advice is appreciated as well !!

Hello, I just received a cleanup crew shipment and in one of the bags with a whole mess of dwarf ceriths there was what looks to be an extremely small clam. It's no bigger than a centimeter and I'm wondering if anyone knows if it will get larger or remain small. I placed it in my sand bed...