critter id

Just found this in my tank don’t know if it’s bad? Hard to get a good view of it, if anyone could help that would be great, must be some kind of snail but I only have conches in my tank and is not like them at all

What is this on my lobo. Looks like a barnacle but it gets smaller when I spook it.

Hi I have noticed these strange critters. Almost look like little flatworms but move like copepods they are dark red towards black to look at under blue lights. I think they are causing some tissue recession at the base of my acros and my candy cane coral? Or they may not be a pest and the...

Hello, A couple of months ago I happened across a couple of snails entangled and rolling around the floor of my aquarium. I thought to myself that those snails really like or dislike each other. Turns out it was the former and now I have hundreds of little snails sliding rampart around my...

Hello, need help id the small critter I found in the tank. It looks like some kind slug, with reddish color. Reef safe or not?

I found this little creature crawling on my glass at night, and I believe they’re flatworms. Can anyone help ID this? Or at least tell if they’re harmful or not? It looks transparent/white with black dots on them. Doesn’t look like brown flatworm unless it’s a baby.

cool video of my 1.5 year old mandarin eating some kind of worm from the rocks … what do you think it is ?

Hi all. Just seen this and cant find anything that looks similar. Has a deep pink body/mouth and tentacles with balls on the end. Bets photos i can get are attached.

Found these guys hanging in the corner of my tank only a few hours after the lights went off. I rushed home last night from a different town to look at my tank at home after learning about copepods. And sure enough I see these guys doing a business meeting in my tank!! I know there are different...

I noticed these guys the other day on a piece of rock. They sort of look like GSP but they don’t have the purple crust like GSP and they are more white with a very light hint of green on the tips of the tentacles I do have GSP in my tank and they are sort of similar to the smaller ones I can...

Been trying to ID this worm on the side of a rescue coral. It is a hard shell with the mouth on the left side. I think the coral is a torch, but still recovering. The coral has white milky stuff coming off every few days.

Hey all, assuming this torch is fine but curious as to what this is, not sure if it caught some food and is eating or if irritated, hasn't been retracted lately and all water params are in my standard range. Just curious to know if this can be identified.. TIA!

I was watching my rock flower nems (because I keep hoping for spawning) and saw this thing, i thought it was one of my brittle starfish at first, but you can see one of the starfish legs above it so I know it's not that. Plus it moved like a worm? And like folded into itself, also it almost...

Hi I need help identifying this bug? Please help

I just noticed today that they are on my front glass. The one I took a picture of is just so big. I don't know what it is.

Black sponge like object on my zoa rock could someone tell me what it is and if it’s bad for my tank

Hi everyone! I received my first ever corals the other day. I dipped them in Coral RX and also hydrogen peroxide to remove some algae. I’ve been watching them constantly on a frag rack to make sure there’s no nasty critters or aiptasia before fixing them into the tank. Today I’ve noticed...

My tank in the last few days has been getting these tiny tan-brown ish circular creatures on the glass… they don’t really move, just sit there with their appendages or whatever flowing in the current… are they harmful? Does anyone know what they are? I can’t find anything and don’t even know...

Looks like mojano to me but want to make sure as it is next to a ricordea Yuma , can anyone help ID here are the best photos I could get it is very small right now

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...