critter id

Any help with an id for this critter that has decimated half of my papaya clove coral

Just asking what these things are and if they are harmless or not, I think the third picture is copepods? maybe idk im bad at ID. And also enjoy the pics of my possum wrasse skippy

Does anyone know that these things are? I think the one in the sand might be Aptasia but I’ve never seen in in my tank before. And the other looks like hair algae almost but idk what the saltwater term is? Any help is super appreciated

Found this on a frag plug, any ideas?

Hey yall, Wanted to see if anyone could help out with a critter ID. I was out of town for a week on holiday and upon my return I noticed these little white dots (they appear white to the blind eye, but are more of a greenish color when under magnification) on a zoa frag plug as well as a few on...

Hi, Recently had what I believe to be some sponges popping up in the tank and they’re spreading quickly. The tank is 18 months old and there’s signs it’s starting to mature and the corals are doing well, I run a simple soft coral tank, 90G display. I’ve done a little research on sponges and...

I was wondering what type of algae this is and how to get rid of it

Recently noticed these guys all over the tank. I think it's like a cleaning crew. Am I correct? Are these good to keep?

Hi all, Does anyone know what this could be? It’s spreading quite aggressively and seems to irritate my corals. I’ve looked around but haven’t found an identical ID yet – to me it resembles colonial hydroids or possibly majano anemones, though I’m not certain. Thanks in advance for your help!

I am unsure how to describe it. I had some anemone that I thought had died some time ago—but nothing quite like this I think. Is it safe for my snails and sea urchin?ter

Found this guy in our aquarium, no idea what it is. We kept in the back side of the tank for now until we know if we can keep or not. Anyone can help identify this?

Help. Me and my husband are new to reefing, we started in January this year. We have found this little guy in our tank a few weeks ago and have asked our local very knowledgeable reef shop what it is but it has stumped them. Any help would be great

Looking for some ID on this reef rock critter. There are a couple small worm things on this Fiji leather rock, and I have no idea what it could be! They appear to be coming out of their holes to eat the little old/decayed bits on the leather’s foot and then returning back into their holes. I...

I have several of these in my 5G pico, anybody have a clue what they are? Do they provide any benefits to the system?

I'm curing live rock and found this on the bottom of the bucket. It's only about 1 inch long. Any idea if this is a good hitchhiker for a reef aquarium?

Is this a filter feeder or start of aiptasia. I dipped them in revive before I added them. Ty for the help

Hello all, Today, while I was doing my routine checks of my tank I noticed a little slug crawling around in the sump. It’s kind of hard to see, but it’s about 1/2 to 3/4 of an inch long, just chowing down on the algae down there, lol. Must’ve been super small when it hitchhiked into my tank...

Any idea what this is? It’s really dark purple with black spots. What’s throwing me off is the fact that it’s shiny and not matte like most sponges. It’s just slightly smaller than a plum.

I ordered some rock and critters and they sent another crab that I didn’t order. It’s orange and white with striped legs, any ideas? It’s not going in until I know what it is.

Finally was able to catch one of the large amphipods running around my tank at night. One of them is the size of a freshwater neocaridina shrimp! I know they are mostly seen as good but anyone have an idea on what types could cause problems? Probably too many species to count. I think they are...

Found these looking at my glass almost looks like a tiny brittle star or some kind of anemone. They’re so small about the same size as copepods. See pics, any ideas?

Hi. I have absolutely no idea what this is. Holds against glass quite strongly. Any idea?

Hello, can someone help with identification of this. Just noticed a few swimming around and stuck to the glass. They look like badmitton birdies when then are swimming to me, hence the title lol. I’ve only ever put Tigger Pods in and I’m not sure if this is them in a different stage of life or...

Hello all! I was cleaning and moving some corals around in my tank and found that near a colony of some zoas there appears to be some kind of brown clove polyp growing around them… which is weird because I’ve only ever had firework cloves in my tank which are never brown, even when young...