hitchhiker id

Are these snails and this nem bad? I just got them in a frag swap.

Anyone have any idea?

So, this has been growing out of a hermit shell for a while and was just a white stalk. I have the stalks in several other places, but I noticed this one and have no clue what it could be. super cool looking.

Can anyone confirm this is a nudibranch and bristleworm? Released during dipping of some frags.

I haven't been able to figure out why my open brain coral is slowly dying, and then noticed this last night after the lights went out https://ibb.co/7VJ09PG My first thought was it kind of looked like an eye of a fish. This morning I pulled it out and on the bottom if it were these. I have...

I see these stringy things coming out of the sand all the time. I believe the worm stays under the sand and puts the strings out. I saw it on the glass and tried to take some pictures. Let me know if you can identify this. Thanks

Hey all found this in my tank last night and forgot to post it any one have any ideas?

I think it’s a baby brittle sea star but not sure came on some live rock I just purchased.

Hi- I am a new hobbyist and am just cycling my first reef tank! I went to my LFS to purchase my live rock, and noticed some interesting hitchhikers. I have done some research and believe one is an Aiptasia anemone- and have read it is recommended to nip those in the bud. But don’t know what the...

Hello, I've had this scoly for months now, yesterday I noticed that it is showing some of its skeleton and when I looked closer I found these critters. Can anyone help with identifying them? and how to get rid of them? Note: I posted this question on the "Reef Aquarium Discussion" page, but I...

Not sure if they are feather dusters or aiptasia but fairly confident it’s a worm. I am new so looking for any clarification before I put into my display. Thanks. First post. Lurker for long. Finally starting to get hands in reefing.

Pics below

I got some Kenya trees on live rock a few months back and as time has passed this little green anenomie looking hitchhiker has grown, I hope it's a good guy would really appreciate if anybody could I.D it

Happy Saturday (to most). I purchased 20lbs of deco live rock from gulfliverock.com which arrived on Thursday, thanks Dan! I'm loving it so far and I am excited by every new thing I see. If you have seen my other posts you'll notice I'm kind of a name junkie, so as you can imagine getting rock...

Hey everyone. I’m looking to get an id on what I think is a snail? I just want to make sure I don’t need to pull it out! Thank you. I do have a video as well but can’t upload from my phone for some reason. But it moves just like a snail.

I noticed under my Kenya Tree frag plug there is some fan looking thing coming out of a tube. It is encrusted on the frag plug and if you squirter water at the thing it does retract into the tube and come back out later. Any input is nice and appreciated. I am not used to hitch hikers. I...

Hi Guys, I added my first coral to my tank on Monday, a single Rasta Zoa polyp. I did a coral dip using Coral RX Pro and Seachem Reef Dip. Over the last couple of days I’ve noticed something that appears to be growing out from the base of the polyp. Any ideas what this can be?

Hello Reefers! Quite interested in an identification of this clear lil guy. Almost reminded me of a mantis shrimp, because of the way it was walking, but not sure. Possibly a Squillidae? Has anyone found anything similar? Thanks!

What are the things all around the Zoa heads on this Frag? I dipped the coral but they opened right back up.

Just noticed this on a frag that's been in the tank for about a month. I haven't seen them anywhere else in the tank so I guess it came on the frag, but just now noticing it. Can anyone help ID what this is on the base of this hammer?

Hello, I have these little “cocoons” all over my tank - on my rock and corals. I’m also seeing cobweb-like strings all over the tank. Help - what is this? Some kind of worm? I realize there’s a feather duster featured to the side in one of my pics, but it has a separate cocoon than these...

There are thousands of these little white "bugs" crawling all over my live rock. Are these some form of copepods? Are these good or bad? (See attached video)

Hey guys, just noticed this thing, and wondering what it is... Was thinking aptasia but not too familiar with it as I've been lucky enough to never have an outbreak. There's also a few pepermint so thought they would have found it if it were. Let me know what you think. Thanks!

Found these two little ones surviving in a filter sock. I don’t want to influence the identity by telling you what is in the tank.. Thanks for looking and your help!

I have spotted a creature in my rock works . Nit sure if this enough to ID it but let’s give it a go. For sure doesn’t like light