To use the Anchovy Halo in Fisch, open the menu, go to the Other or accessory-style tab, and equip the halo from there. It usually appears only after you have the required Supporter-style access, and then you can customize its color and position on your character.

Quick steps

  1. Open the in-game menu.
  1. Go to Other or the halo/accessory section.
  1. Find Anchovy Halo or the halo entry you unlocked.
  1. Press Equip or enable it.
  1. Adjust the color and height/size if the game lets you.

What players mean by it

The halo is treated like a cosmetic accessory , not fishing gear, so you do not use it like a rod or bait. It is managed in the customization menu, and several guides say it may require the Supporter pass before it shows up.

Note on Anchovy

Anchovy itself is a common fish in Fisch, and it can also appear from meteors, which is why the name can show up in halo-related posts or challenge clips.

TL;DR

Open the menu, find the halo in the Other/accessory area, equip it, then tweak its look. If it is not visible, you likely need the required Supporter access first.