critterid

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...

Hi everyone, can you help ID this crab. It’s very shy. I have never seen it come out completely of the rock work. This is the best picture. I have been able to get of it. thanks!

Does anybody have any idea what that white stuff is growing on my frogspawn? Should I be worried? I’ve had it for about a month and a half and it seems to be doing great and it’s growing too. The stuff looks and feels like thread..

Attached are photos of gelatinous blob found in tank this morning. Sitting on top of some Feather Caleurpa (might not be spelling that right but the green seaweed) there is this white blob, about half an inch or two centimetres in diameter. Tank is FOWLR, emerald crabs, starfish and astrea...

Hello, I have a couple of those things on the glass? Any idea what they are? Good or Bad?

Hi, I’ve just finished cycling my tank and I’ve put a grain of sand under the microscope to see this? There like little bugs zooming round near/next to the grain of sand. Anyone know what it is? Is it bad or is it the bacteria that came with the live sand? Thanks :) Here is the video of microscope:

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...

I love weird things in my tank. But I do like to know what they are and what they eat before I let them run loose in my tank. Arrived in a package of pods.

I found this critter today. I am not sure what it is. Good or bad? Should it be killed with fire? Seems like a small orange worm with small white tentacles, or hairs, on one end and pointy on the other end. I hope the pics help. Thank you for your help!

Hello All, I have notice a few of these pink sponge type things popping up. 1) Are they sponges? 2) Are they good or bad? 3) Should they be removed? Thanks to all you experts!

Hey guys so i found this guy again after a long search (many nights). Have no idea what this is and actually don't understand how it got into the tank as I started with dry rock and i dip all my corals. Anyways I'm sure it's Reef safe because till now I haven't seen any coral or invertebrates...

Hello, Yesterday I noticed these things, marked up in the image, in my tank. I tried poking them and they close up and retreat to the hole in the live rock. Can someone identify them? and tell me whether I need to do something about them? N.B. I always dip my corals in Seachum dip, and I don't...

Don’t know what this hitchhiker is can someone please help iD if good or bad. Thanks!

Please help!!! My boyfriend and I have just spotted these tiny tiny white spots in our tank! They kinda look like worms? THEY. ARE. EVERYWHERE. Can anybody try and identify these things?? *the picture isn’t the best quality, i apologize for that * Also, excuse the algae! *any tips on...

I have a mysterious orange growth that looks like spaghetti noodles growing on my Chateo.. I removed it once a few weeks ago and now it has appeared again, I am struggling to find any information on this. TIA to anyone who can identify!