critter

Hello everyone, I just noticed this thing when i was looking around at night. It reacted super quickly to the light and i thought it "popped" as it just disappeared to a tiny hole in the rock... Had to point my camera on video and finally it emerged again.. hopefully those video screenshots...

I found this weird anemone with a brown foot/stem and purplish blue tipped tentacles. It was on some Indonesia ocean cultures live rock. The rock has been there for about four days and when I looked at the anemone earlier it was small, just now it became bigger. A smaller one

I found this little green dot looking thing on my sandbed in a low flow area today. It was sitting there before I placed it in a cup with sand at the back of my tank. It’s about the size of a nerd candy, neon green and I can see a spot without green which I assume is the foot, if it’s a...

Long white stringy creature living in chaeto. It retracts when I touch the water or it senses vibrations on aquaclear filter. Maybe some kind of worm??

what is this thing? I found it on my chaeto that I bought from my lfs today. It is rainbowish Brown in color and very small. Any ideas??

what is this? It is in the chaeto that I just bought.

Update: Upon further research, I was able to educate myself a little. It appears the snails are harmless and the limpets?; are as well. The flatworms though; not so sure. Hello all! Found a few new critters I haven’t noticed before. Seen a few of these little snails climbing around. They’re...

I recently noticed that a frag of green mdntipora had a small area where the flesh was gone and the skeleton was exposed. It had soon before i noticed this fallen from it's spot, so I thought that it had possibly been damaged and the flesh had simply fallen off. I kept an eye on it, and a week...

This little guy looks like a shrimp. Swims fast. Noticed him while doing a water change.

i cannot tell what it is... i have 2... they are tiny rings with little tentacles and a white bubble on the tips...

Is this little guy good or bad? Just found him on a rock in the tank and I think saw something that looking like this one saying take it out.

I just got home from work and wanted to check the tank out before I go to bed and noticed this wierd looking worm. Can anyone tell me what it is and if it's good or bad?

Happy Thursday Soo I got some zoas that were getting eaten by this little Dude but I got him out. I am noticing more than just him. Please help me identify what I need to do. Thanks in advance