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I was vacuuming some cyano out of my tank last night, so I got the hose into the sand bed really well in an attempt to rectify the previous owners (and my dads while he had it for 6 months) long term neglect…. i don’t know where this came from, but I saw it sticking up out of the sand, so I...

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?

They look like limpets or chitons the size of pinheads, attached to my refugium’s glass pane, but they jitter and have pulsating appendages like isopods. What do you guys think? Below: location of pulsating appendages, circled in red.

This sprung up in my old temperate build several months ago out of nowhere (likely from a spore). It has grown slowly, yet steadily ever since. I would assume it hitchhiked on some North-Pacific seaweed.

Hello, I noticed one of my corals looking a little sad today. I took a closer look at it and found some white growth on the skeleton. Some have a tube like structure, but it doesn’t look calcified or hard. I took a couple pictures of it. Any ideas of what it is/ how to save this guy. It...

I found this black stuff on a new piece of CaribSea South Sea Base Rock (it came out of the box a few days ago and has never entered my aquarium). It does not scrub off and appears to be encrusted on the rock. Should I worry about it?

This stuff has been growing on my corals and on my rocks and I literally have never seen it before ever, can someone ID this weird stuff for me?

I keep finding these white fuzzy type things all over my rocks and I’m concerned about what they are, hopefully you can tell what they are in the pictures, if not I will try and take better photos

Is this something I should worry about?

I can’t seem to find any pictures of a coral that looks like this one, maybe you guys know what this soft coral is?

I went to buy the coral that I last posted about but they did not have it, they however had this one and it looked interesting and unique and I have never seen a soft coral that looks like this, I have no idea if it is full extended are not in these pictures but I can say he was way shriveled up...

This coral is at my local petco but I have no idea what they are and they get them in all the time, can anyone help me with this I’d?

I got this coral as a unknown soft coral I thought it might have been a Kenya tree but it looks nothing like the Kenya tree it’s next to, a ID would be much appreciated, thank you.

Hey guys. I’ve noticed this white splotch on my purple tang recently but did not think much of it. Recently my powder blue tang died, i’m unsure of the cause, but I remembered that the powder blue tang had a similar white splotch a week or two prior to him dying. I’ve attached photos of both...

Hi, my mother recently got into the reef hobby, and after setting up a refugium in her sump just a few days ago, she has noticed this growing from within the chaeto in the sump. The Cheeto came from her local fish shop, and have only noticed it today so haven’t been able to get to the shop to...

This came off of two zoanthid colony’s I bought from petco, can anyone tell me what it might be?

So I see these small white weird looking things everywhere on my rocks and it doesn’t look like aptaisia or anything to me

I saw this thing crawl out of one of my rocks during coral feeding, I swiftly took it out but am concerned on what it is please help I.d this thing for me ,thank you.

I noticed some white hair like things coming off of my cleaner shrimp today (see photos & video). You can really see it protruding from his legs and tail. Does anyone know if this is normal? I'm afraid it might be a parasite or some sort of sickness but I cant seem to find much information on it.

When the fish enters the tank it is perfectly healthy and eating regularly however its appetite slowly begins to go down until it stops eating, this is noticeable after two weeks. By around the third it starts flashing against rocks and erratically swimming all over the tank causing bruises and...

Just found this yesterday I do have some astrea snails and I have a hermit crab that I know likes to munch on the dead ones. I also have a snowflake clown and an orange one, don’t know how to spell the other name for them, and a coral beauty . Just wanted to see if anybody has seen something...

It all started when I added a midas a few months ago and ever since then any new fish I add to the tank will always die after a week or two however it does not affect inverts. The symptoms displayed are a reduction in appetite but still eating and gently pacing the glass. At the end the fish...

A mysterious snail has appeared in my tank. Is it a good snail (coral friendly ?) or not? Can someone identify it? thanks

Hello guys, I have a clownfish and diamond goby in a 20g QT tank. 2 days since purchased. They’ve been getting light feeding and seem okay. The goby is shy and stays hidden behind PVC. The clown has some tissue degradation. Looks like skin peeling, on his tail, and fins. I’ve started dosing...

Can anyone tell me what this pest is, and if it is a threat to my reef. It’s a very small white/ or translucent oval shaped pest. I’m seeing them on my glass as well as coral and live rock.