polyp id

So I’ve had some major issues with nitrates due to over feeding of brine shrimp party because of me being away and a friend looking after the tank and partly me worrying about a mandarin goby. Now I’ve got some algae issues etc that I’m working through but I’ve got these weird very very fine...

A couple weeks ago I added a half pound piece of live rock to my nano as an island for the mushroom I’m planning on adding. Today I noticed this really small thing that looks kind of like a polyp on the rock near a hole. Any idea what it could be? There’s also a similar looking one towards the...

Hello, I need help to id this hitchhiker! I bought a colony of discosoma mushrooms a while back and I notice colony of polyp-like hitchhiker beside the mushrooms. Some of the mushrooms that close to the polyps kinda shrunken.

Hey reefers! Anyone know what this is and how to destroy it?? Iker