critter id

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...

Hey everyone, Just recently set up a new reef tank with some live rock and noticed this little guy. Shaped almost like a virus cell or an egg sac, you can see it has attached itself to the rock with multiple tendrils to hold it in place, does anyone know what this is? Maybe a sponge? If you...

I see multiple things on my glass, my tank was empty for over a month except for all my inverts (no coral just hermits and snails) and I just added some new fish and noticed all these weird critter/things on my glass. Any idea what they are? I’ve had tiny little white worms on my glass for...

Hello guys, I’m new to reefing. Can you help me ID these things; that long tentacles; those white spots on the glass (I think it’s hydroids); these white hair on the live rocks; that thing on the edge of the rock (I think it’s a pineapple sponge). And can you tell me if they are bad or...

Hi All - was doing my usual Chaeto trim and found a couple critters, any idea on this one?

Hey everyone, I found this guy in my aquarium, I took it out just in case it’s bad. Would anyone happen to know if this is a good guy or bad guy for future reference incase I see more.

Hello R2R and Happy New Year!!! I have an otherwise very healthy looking hammer that I just noticed tonight (lights off) has this on it’s stem/base? I’m only about 8 months or so into the hobby and, although I’ve battled some other well known pests (aptasia and vermitids), I’ve been fortunate...

Hello I just got some live rock and I found a thick black worm with pointy things on it. It was in a cranny so I could not get a good look it a pic. Any ideas

We just bought our first batch of livestock for our first marine tank yesterday. We bought 6xCerith, 6xTrochus, 6xNassarius and 6 red legged hermits. Looks like we are losing the crabs slowly. I think 3 are already gone (24 hours). I caught a Nassarius smothering one, not sure if he was...

Hello fellow reefers. I have just noticed that my conch has some weird snail or limpet critters attached to the backside of his shell. A tongue comes out and picks at the sand and then retreats back into the shell when the conch moves. does anyone know what they are ? If so are they safe to...

Right, il admit I have let my tank get a little wild lately as I have been working so much and not had time to clean glass etc but have been feeding and changing water but I have cleaned the glass today and the tank has exploded with new critters/pest/corals! Can you guys help me I.D some of...

Found this lil hitchhiker tonight, anyone actually know what kind of crab it is? And please don’t just say “how cute” or “I want one” Thank you!

Hey y’all, I need some help. I’ve got a more detailed background of my tank on my build thread, I’m going to post a few pics and if anyone can help me ID I would be so thankful. I’m going to have to restart my tank & rip clean, especially with all these issues, but I would still like to know...

Noticed something bright red on some live rock in a dark section of the sump a few weeks ago. 2” red parts. It’s in a hard to photograph area, tonight I crawled in with flash light, check it out! Had this rock either 2 yrs or 10 yrs idk. I need to get back in there and see if it’s a crazy...

Anyone have any idea?

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

Curious to see what this may be growing on the glass of my Copepod grow tank. There are 4-5 of these that have seemingly shown up over night. I recently moved the copepods from a 5 gallon bucket into this tank. Before doing so I thoroughly washed and scrubbed this tank with vinegar and water...

Noticing this thing growing in the tank out of nowhere. Not sure what it is?

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...

Pretty much what the title said. Looks similar to a mite and appears to be attacking dinos. I attached a video below. Please pardon the random movements because I lost the creature and was looking for it again. I can’t attach a video because the file I have is too large but I will attach a...

Wassup Reefers, Cleaning my sump today and found this little thing on my skimmer. I have only seen one once before in my tank a hand full of months ago and it was between a frag shelf and the glass. (which I got rid of) It looks almost like a vein or root that definitely gets larger over time...

So I was taking a dinoflagellate ID and I saw this little pod that looks like it was stuck or it was feeding. Can anyone confirm? I attached a video, and to see it you need to be on a laptop or desktop. It doesn’t work from the phone for some reason. #reefsquad

Just found him under some clove polyps. Looks like a flatworm but I'm not sure

Today I found this mushroom moved over and underneath where it used to be was this thing. It is bright orange under the light and theres about 30 legs all appearing to come from the same spot. Definitely moving and looks like the legs are stretching out and grabbing things. Should I remove it...