#helpidentifying

Hello! A couple of weeks ago, I started to get these white things on my stones that release these whip-like tentacles at night (as you can see in the video). Are these things harmful to the tank inhabitants or can they stay? And what kind of creatures are they anyway? Thanks in advance for...

I’ve had a problem with my blue tang getting sick before and many said it was bacterial, so I QT her about 2 weeks and everything cleared up. so I put her back in my display, and a week later after an addition of a royal gramma she pops back up with spots over night. They do not look like ich...

My reef is 4 mouths old. They have appeared out of nowhere and I'm not sure what to do. They are not copopods tho. What shall I do? I found hundreds in my tank and I tried removing them but i cant because there's so many... I need advice on what they are and how to deal with them, if they are...

I have this new laffy taffy goniopora, and I just wanted to know what’s up with those longer tentacles that it has stretched out??

I just bought this coral and the store we bought it from had an employee who didn't know what it was. He sold it to us as a hammer, originally we thought it was a frogspawn, but when it opened up in my tank some of the tentacles had hammers. So i don't know if its a hammer thats not all the way...

I have had this blue sympodium frag in the tank for about a month and a half. This morning I noticed this clear/whitish thing growing on it. Can someone help identify it?

It doesn't look like the last bristle worm I ran into which is why I ask... he's surviving in my dip water and looks spiny. Trying to figure out if I want him in the tank or not... surprised he's still alive honestly

Hello, we got an aquacultured coral several months ago. We dipped and scrubbed it and tried to remove any pests. However we have found these structures growing on the bottom of the mount, it has spread to around the mount. They seem to be light sensitive and will get larger at night time, and...

Can anyone help me identify this crab? Can’t find it on Google search the crab was a gift from its previous owner but previous owner said he bought him and added him to a tank and never saw him again inside the tank until today when he was transferred to my tank. He has completely lost color and...