critter id

Hello All. New to the hobby and the tank is new (3-4 months Old now) i was just sitting there checking everything over and noticed this bug with wings sat in my return pump section of the sump. To me it looks like a fly as it looks like it has wings but it is submerged under the water and has...

Hello all, I've got an amphipod population that I impulsively added to my new tank from my old tank. I was focusing on the biodiversity in the new tank before thinking about the fact I might be transferring a pest. Can anyone help identify what type of amphipod this is? I am concerned...

This is Eugene. I collected him in South Florida back in June on the Atlantic side while on a weekend trip down there. He started off super small (smaller than a blue legged hermit crab) but is growing far faster than any other hermit crab I've ever had. He spends all day cleaning the sand bed...

Saw a bunch of these egg-like fellas wiggling on the top part of my cerith snail. I just treated it like it was an invasive parasite; they easily came off the snail when I isolated it and blew some water over it. But I’m curious, what were these critters?

Hey guys & gals , happy weekend, hope everyone is doing ok Recently found this growing underneath one of my scolymia, appears to be some sort of sponge / truncate but wanted to post photos just to make sure it’s not something more invasive which warrants removal Here is a photo (attached) the...

I set up a new 40 gallon breeder about 3 months ago. Recently added a cleanup crew with a few snails, some hermit crabs and a couple of tiger conch (though the person that sold them to me told me they were turbo snails). I did some cleaning today and had to pull a few rocks out and scrubbed...

Anyone know what this is? It glows fluorescent orange under blue LEDs. I noticed it growing on my live rock recently. Doesn’t seem to spread or grow very rapidly. Is it a cool hitchhiker or something I need to remove? It feels almost like an anemone between my fingers.

Hello Everyone This is a thread to hopefully finally figure out what these strange worms are. These have appeared in many threads in the past several years but so far we have no true ID , as it seems they are becoming more prevalent in our systems , I thought I would put together one final...

has anyone seen these and figured out what they are? they are all over my rocks, favia/favities,but not really on my side, back or front glass.

I just found this molt on the rockwork of my aquarium and I realized I have never knowingly put a crab like this in my tank. Does anyone know what kind of crab this is? It's barely the size of a dime. I tried to ID it using Google search by image and I kept getting either large Land crab...

Found little isopod-looking guys in my Chaeto as well as on my live rock. They seem to come out at night. They look too big to be copepods... so what are they? Should I be worried?

I found this on my tank today. Anyone happen to know what it is?

Could you please help me id this snail? It was caught off the turkish coast of the mediterranean sea. It seems to be a scavanger, they all gathered around a dead molly or meat but they don't seem to eat any algae. They are very inactive and somewhat nocturnal i guess. Sometimes they randomly...

Strange object on back glass, anyone have a clue as to what it is?

Had these guys start to takeover my tank anyone know what they are? They are about 2 inches and extend and retract their body to eat and have very small hairs on them like a bristle worm.

Doing a water change in my 12g cube and found these eggs. Anyone know what this is? I have never added any snails. LIVESTOCK -Firefish Goby -2 Percula -Unknown Crab

Looking for ID however I’m not concerned and I’m sure they will become food. Sucked them up with a pipette near sand they are kinda swarming. My stock, Pitho crabs, Reef cleaners cleanup crew variety of snails Emerald crabs 10 small hermits mixed. only pair of fish would be blue green chromis...

I have a few critters to ID and I hope none of them are bad. I have supplied a slew of pictures, with no clear meaning or direction. 1. I have a few clear/gray blob things around my tank that are just popping up and I’m not sure what they are. 2. I have a few root-like structures around the...

Hey guys, hoping someone can identify this clear flat worm like creature I found in the back chamber of my Biocube. It hitchhiked from Tampa Bay Saltwater Live rock/sand. It looks like it has a skeleton structure, is extremely sensitive to light, as is super fast moving.

Found this little guy wandering my tank glass this morning when putting up some new frag racks for some coral I had coming in. He/she was not one of our purchased cleanup crew. Did our clean up crew multiply or possibly a stomatella snail? Or is it something else that should probably be tossed...

Got new corals, dipped them properly and i’ve just seen this right now at night. Any ideas what it is and if it’s bad ? looks like a starfish or something similar. quite small and white and pink/ red bands ?

Purchased some live rock from KP aquatics about 3 weeks ago and was trying to spot and catch a possible gorilla crab but I found this instead. I think it is a fire worm but not sure as it could maybe be a bristle worm too. Anyone have any ideas? Sorry for the loud noise in the video it is the...

I was cleaning my glass and noticed an abundance of these small Star like critters on my glass. They’re tiny - like a thin point to a lead pencil. To my eye they look like 4 pointed or Star shaped, but my phone was able to take a pretty detailed photo. Here are two different ones. ‍♂️ curious...

There is something semi transparent under one of my zoanthids, anybody know what it is