Can anyone identify these 3 things? Worms? Algae? Bacteria?

[Mark Shelly]

This dark stuff appears to be irritating some zoas or even attacking them. It has some air bubbles on it. This is the only place in the tank that I see this.

This is behind the right mushroom and appears to be branched. I don't see it moving in the current.

This is behind the baby mushroom.

 

[Joeganja]

Algae and detritus. A good clean up crew would help like snails and crabs.

 

[zeeGGee]

The 2nd photo looks like hydroids...

 

[saltyfilmfolks]

Algae bryozoan Hydroids.
The third pic is a bit fuzzy. Check lionfishlair.com. Hitchikers.

 

[Lionfish Lair]

I agree that the 3rd is hydroids.

 

[Mark Shelly]

I agree that the 3rd is hydroids.

Thank you for your responses.

Lionfish Lair, the link for Bryozoans takes you to the brittle stars. That is a very useful guide. I was looking for it as a sticky link in the hitchhiker forum before posting, but I didn't remember it was linked to your posts. Thank you for doing this guide.

 

[Lionfish Lair]

Oops! Need to go look at that. I thought I fixed that before... loosing my mind.