unknown creature

So I got a anemone that came with a rock it was attached on. The anemone moved from the rock and when I took at closer look at the rock it looks very strange. Is this some type of algae? It looks like it had tentacles growing from it and some other weird patterns. Please see pictures below and...

Cleaned out my HOB filter today and found this guy on the filter. Never seen anything like it before. Currently the tank has a six line wrasse, a diamond goby, and a couple hermit crabs. Tank is 29g also, any idea of what it could be?

Hello, I just want to know if I should be worried about this guy and if 'you see one there all lots' kind of mentality. I looked quite a bit and did not come up with anything. Please let me know!

I have a hitchhiker or critter of some sort in my rock. I thought it was a hair algae but it will retract into the rock if I try to tweeze it out. And now I see it coming out more than one hole in my rock. Any idea what this is? Is is safe or do I need to figure out how to destroy it?

Unsure what this thing is growing on my zoa. Any help would be appreciated.

I saw this thing crawl out of one of my rocks during coral feeding, I swiftly took it out but am concerned on what it is please help I.d this thing for me ,thank you.

Hi, I have here two Mollusks... I think The first toothlike creature wandered one night in my tank and after recording it, I never saw it again, but I am still dying to know what it was. My own theory is that it is a normal snail but it's shell got cut off partially. It's in a video I posted...