What is eating my coral?

[NewbieC123]

I noticed this coral was not looking healthy after examining it, I noticed a big chunk was gone and there are 3 types of pests. I identified one. Any advice??
1. A v-snail tube in red.
2. Some sort of white worm that is tucked up in the eaten section where it meets the red part.
3. I also noticed something with “tentacles” that are orange-ish. The first photo shows it. If you look where the plug and the coral meet at the top

 

[Fungusamongus]

There are probably many people that could help you. I am not knowledgeable enough. However, it might be beneficial to post photos under white light. I cannot see anything you are describing and they might benefit from the photos under white light. Best of luck and hope you get this solved.