hitchhiker

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...

I found this guy near the waterline after a water change. Its pretty large and can be easily spotted with a naked eye. Its in a bucket now. Ive also seen something smaller that had a similar body type but a roundish hard piece on one end that looks like what some snails have on their ‘tails’...

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 -

I had a Sandshifter starfish about 5 or 6 months ago, and I thought it died. but now I find this. Or is the a hitchhiker? it just sits on the rocks. then disappears a day later just to show up again, some days later. I see it mostly at night. about an hr. before the light goes out. The colors...

can anyone help id this hitchhiker crab i just found in my tank? would like to know if its good or bad its light brown with white claws with brown tips, abit hairy on body and legs

Been having some algae problems in the last few weeks but got my Trochus Snail. But in the last day or so i just noticed this odd thing on the back of it. None of the other’s have it. Anyone have a good guess? And if so should i remove it?

And is it good or bad. Not trying to have something grow that night over take my tank.

Can someone please identify those small moving black dots on my Scolymia button coral? If my calculation is right, the dots are very small, ranging between 0.04 and 0.06 mm. Which should be 10 times smaller than the Black Bugs, if I'm right. For scale reference, the head has 1 inch diameter...

I have no idea what this thing is, i just noticed it on my frag, i dipped the frag before hand as i do with all drags but???? It’s creepy and I’m not sure if i should be worried. I tried to get a good picture of it but the lighting is kind of temperamental sorry.

Never seen this before. Approximately 1.5 inches from top to bottom. Any information would be appreciated

Never seen this before. Approximately 1.5 inches from top to bottom. Any information would be appreciated

Hi all, I’ve had my reef tank for about three months and yesterday I saw a pink rice size thing floating past me in the water. It looks like a piece off a torch coral tentacle for the cooor and thickness. But this morning, I noticed it has attached to my glass and Found a second one. I’ve...

Anyone have any idea?

Does anyone have an idea what this green macroalgae is? I obtained it a month ago on some LFS live rock (which I assume originated from the Indo-Pacific when wild live rock was more popular). Since then, it has doubled in size, having grown to an inch across. It is smooth, and stiff yet is very...

Recently bought this guy at a show and it’s in my q tank atm I’m not exactly sure what it is growing on them but the guy was not very forth coming so obviously was a poor choice I just haven’t been able to find out what it is thanks in advance I also can’t tell if it’s aptasia or not cause it...

Hi everyone, I’m a reasonably new reefer and was wondering what this little hitchhiker might be. I’m concerned it could be aiptasia but it has only slowly grown over a month or so and it has not reproduced to my knowledge. It also doesn’t look like aiptasia that I’ve seen. Any help would be...

I have absolutely no clue what these things are. They came on some LFS live rock, which I believe originated from the Indo-Pacific. They have no holes, feel quite tough, do not bend, and have small “tufts” on their spikes. They also do not appear to have grown since I introduced them a few weeks...

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

Dear reefers, I got this green star polyp 1 month ago and now notice there's a possible aptasia? Anyone can verify? thanks! Attached video below taken during light off with ambient room light, polyps all closed up.

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

Does anyone know what this yellow is? There’s also a wired mussel looking thing lol

Hello All, Today I took out macro algae to clean and rinse and found these guys underneath the branches. they aren't moving actively and seem attached permanently to my macro. when trying to detach, they break and "head like" part stays on macro. Either it has mouth attached to macro or it...

Hi all, I’ve had a rose BTA for nearly 3 months which came attached to a small piece of live rock. Today I noticed what looks like two aiptasia growing on the rock. I’ve had these come in on some coral frags before which I dealt with by smothering in superglue, however those were white and...

Hello! I've got a strange hitchhiker on a zoa rock I got. Noticed it this morning when I was feeding my corals some reefroids. https://photos.app.goo.gl/nzfTw5MGDEtZ4vP5A It looks like some sort of filter feeding worm, but I'm curious which type. Apologies for the poor quality video, but it's...

Can anyone ID this?