hitchhiker

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...

So recently some weird growths have been appearing around my aquarium, sort of all over the place. They are soft, kind of porous, and an off white color, but seem to grow blue after maturing for a while. It seems the feather dusters of my aquarium find them ideal places to root into as well...

I'm 5 months in, and my little aquarium is happier than ever, with tons of biodiversity. I've got spaghetti worms, amphipods, copepods, bristle worms, and stomatellas.... And Aiptasia. The one thorn in my side lately. dang aiptasia! I've been using Aiptasia F for some time to deal with Aiptasia...

Hi all, hoping for an ID on this or these things. Hiding in my rock. I had a look through the sticky and nothing except maybe hydroids came to mind. You see it move something out of its hold and it seems to be popping out of multiple points in the rock. These were taken during the middle of the...

Hi all, I would like to share my recent (and on going) experience with indonesian life rock, for the fun. In the past I have used: Real reef rock in conjunction with dry rock that was previously live. I do noticed that coraline algae appeared quite fast (at 1 month old it started to show up)...

Hey all! I’ve noticed these small white dots floating in the top middle chamber of my Waterbox 20 sump. They seem to swim when I turn all flow off, and there is a ton of them, and also seemingly react when I shine light on them at night. They’re tiny, smaller than the tip of a pen, can see...

Hi All, I have a new reef tank (4months old. First one) I've noticed these little guys crawling around in the dark. Curious to what they are?

This thing hitchhiked in on this rock. Can anyone help me ID it?

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