critter

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...

Hi everyone, I was just looking in my tank with a flashlight when I saw a couple of unknown isopods crawling around my Zoanthid coral, these isopods seemed to be eating away at the fragplug. I went to google to see if they were harmful since i’ve never seen them before and I only came across...

So usually I never really pay close attention to anything in my refugium, all i do is get rid of some seagrape and Chaeto that have grown to an extent where it blocks off the top view of the refugium. This time after resetting up my dosing pump, i realized this weird creature hanging on the side...

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.

This is my first tank and I have been keeping it for almost 1.5 years. I have no idea what these small black polyps are that are growing like crazy. They seem to be a small fast-growing coral that closes when I touch it. My LFS told me to basically perform surgery and get the zoas off that...

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...

Just though this was cool, recently got some female emerald crabs from reef cleaners in hopes of tackling a moderate BA outbreak (even though nitro is undetectable) , they have completely ignored the Bubble Algae … One of the emerald crabs kept going to an area in the rocks and eating some sort...

Hey everyone! Back again with another critter ID! Found this clam-like critter on one of the shells that this hermit has been carrying around for a while At first I figured it was just some sort of abnormal growth from the snail that used to call this shell home. I noticed recently that this...

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?

. White object under my rock fluffy looking

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 ?

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

Hello! I run a 5 gallon PICO tank that until yesterday had no fish. I also feed phyto daily, so there has always been an abundance of wee beasties that have fascinated me. Most I've been able to identify (copepods, amphipods, munnid isopods, spinoid worms, spirorbid worms). However, there have...

Sorry for the bad pictures. It’s i. My fluval 13.5 and I didn’t scrape off the back side of it. You can kind of see it but they look like white webs all over the chamber in the back. Looks as if they’re keeping the chamber clean of detritus in the first one but the second chamber is a little...

Hey guys, i just found those 3 guys that i’ve never seen before. It’s been at least 3 months that nothing went in the tank because i was busy with school and my time for tank went south. First 2 pics are, same guy, different angle (i think limpet). Middle 3 pics are, same guys different angle...

Hello I found this little bug / insect thing I’m my saltwater tank. There are also much smaller white ones in the tank and it looks like its offspring. Anybody know what this is?

What is this? I saw this on my rock. Is this a bad thing or a good thing? If bad, how do I remove it?

I just got this frag yesterday and I saw these today

Hey guys, I have got hundreds of these little critters on my tanks glass. I have no clue what they are. Please assist.

Was chilling in front of the tank this morning and observed some spawn being released. At first I thought it was brittle stars spawning which I’ve seen them do before. When I looked closer I saw a small round critter, with antenna, and these two pink protrusions where the spawn was being...

Hello there. If anyone can help identify what this is on my glass. It's not air bubbles. They seem to be swaying and sticking to the back of my tank. Also note that we have added trigger pods about a month ago in the back of our AIO tank. Tried getting a better picture in clearer lighting but...

Just noticed these hanging off my Zoas today. Tank has been fine, I’ve got 10 trochus snails and 2 clowns, zoas, and an elegance. Found 1 aptasia and a majano which I’m dealing with, just in case that could be the cause. If you need parameters, let me know!

Hey all, I’m transferring some stuff into another tank and seen this guy slithering? Anyone know what the heck this creature is?

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.