Let's play, name that thing in my tank

[Jamilio]

1) big worm thingy that I have no idea where it came from

2) red thing that looks melted on my rock. Did my bubble tip die? It kept walking around and then I lost track of it

3) worm thing that looks like poop sitting on my candy cane coral

 

[EagleEye121]

1. bristleworm - can be good CUC
2. Not exactly sure what you’re referring to, but the red I see looks like Cyanobacteria
3. Possibly a vermitid snail