Why is this object appearing in my render view but not my final render?

[GuyTDraker (Guy)]

The outer blue swirls highlighted here appear in render preview but not in the final render:

Material:

Blender file:
https://drive.google.com/file/d/1T0LS2ChB31aXA3H2BXrl9mYR3qawjZ7O/view?usp=share_link

[RSEhlers]

You had your Mask disabled…as far as I could tell…

[GuyTDraker (Guy)]

Homer Simpson - D'oh!