critter id

Hello. After my new tank had an ick outbreak at the end of April, I started my fish less cycle. As I looked more closely in my tank a couple days ago I noticed this guys wandering my rocks. As I’m new to the saltwater hobby, and just had my outbreak, I’m a little superstitious worrying that he...

Hi everyone, I got some new live rock about 3 weeks ago and I've been watching it for critters and such. I think ive identified a clam worm (its almost 3 inches long and is iridescent) I'll attach a photo or two of him as well for verification. My concern however, is another worm...or I think...

Hello I don’t believe this was here the other day Lights are out now but when the lights are on it stays fully extended. Just want to make sure it’s not dying on me. Been in the tank 3 weeks haven’t seen any problems. And yes the coral was dipped before putting it into my tank.

Just noticed these little worms all along one side of my tank they are all living in my sand bed and making little tunnels along my glass not really harming anything just curious what they are. Any help IDing these little guys is much appreciated just wanna learn as much as I can!

Hi everyone, I've had a weird fuzzy like object on the tip of my acropora coral for a long time now. Doesnt seem to grow or move. It's almost fuzzy looking, and a deep red color. Any idea what this could be? Sorry for the picture

Need help with I'd on this little guy.

Hello all, I have been watching this little guy grow on my love rock for a little while now. I was wondering if someone could tell me exactly what my little guy is. He is more pink in color around the center. Any help is appreciated, thank you.

I’m thinking it might be a slug or some sort??

It's gray and definitely has some little feelers coming out of it. Moving really slow. I noticed a bunch of white spots the other day. Could it be a baby snail? Nothing new has been added to the tank except two peppermint shrimp, that i was told were pregnant... or full of eggs. I took a little...

Anyone know what this little guy is? Hard snakey shell, red filter fan sticking out the end. Retracts when touched Harmless? Thanks!

Hey guys just wondering if this is Orange Coraline Algae? Or if it could be a Sponge of some sort?? Thanks!

Are these bristle worms or fire worms?

Is this a baby feather duster?

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...

Found about 4 of these things in my sandbed coming out at night. White worms about 2 inches long or so. Any one know what they are?

I found this in the sand bed and don’t know what it is. After removing it, I noticed that the red strings are moving in the cup. I thought this was some type of algae? There are a couple of places near the bottom of rock that these red strings are, but I don’t see them attached to anything...

Hello! I’m completely new to having a saltwater tank and I’m trying to learn as much as possible. The other day I got a feather duster (been in my tank for 3 days) and today I saw this little guy crawling on him. Looks like a really tiny snail but I’m not sure.

Hi, i found this critter in my tank about a week ago and they disappeared and i found them again. Is it good or bad to have them in the tank?

Hi, Can anyone ID this nem? I’m looking for a nem that will grow into a fluffy tentacles anemone. Does only H. crispa does that?

So I have these white what looks like starfish to me, almost like micro bristle stars, but I'm not sure. They don't seem like asterina's because they're legs are longer and thinner from what I can tell. There's quite a few on the glass I see every few days or so. Anybody know for sure?

So I've started seeing these random white tubes along my sandbed and rockwork. Any ideas on what they might be? A worm? I'm really not sure.

So just spotted this guy this morning before lights came on. He started making his was back into the sand bed when lights started coming on. Can anyone ID if this is an asterina star?

Hi does anyone have an ideas as to what this is? The two antennae are actually part of the critter itself, whereas the rest of the spiral-structure is the “home” it builds (which is quite hard / like a shell — about 1cm diameter). obv my first concern is whether they’re harmful or just...

I’ve had this guy as long as I’ve had live rock (almost a year). He’s big, ugly, and I’m pretty sure he’s trying to reproduce in my tank. Slithers around on my rocks and eats algae, I haven’t had an issue with him yet. What is he??