creature identfication

I have a reefer 250 G2+ Max that has been going for about 3 months, have some minor hair algae in the display I’ve been working on. I was getting ready to do my weekly maintenance and noticed some stuff living in the crushed coral in my sump. One of them appears to be possibly a feather duster...

Hey guys! Happy Thursday! I recently added a brand new coral to my tank and it looks incredible, but it came with a little friend (pick attached). Curious if I should put it in the tank or say goodbye to it? Looks little one of those mini sand shifting starfish. Appreciate the help and advice!

We found this creature type thing on the underside of our Kenya tree. It was hanging out unseen for a while we think since the coral is on a larger rock for a base. We saw it out and on the base of the Kenya shortly before it slowly shriveled up to a small frag. No type of research has given us...

Hello everyone, I was wondering if anyone could tell me what this is. I’ve never seen anything like it in any of my systems before. It’s mostly transparent and is stuck to the glass. It appears to have tentacles that it uses to feed from the water column. It’s very small, maybe the size of a...