This ressource pack is very recommended for the datapack "All TropicalFish Datapack" who allows you to collect all variants of tropical fish.
It can helps you to visualise more precisiously each tropical fish variants via customs models and retexturing for all colors in advancement's menu.
With this ressource pack, collect them all is easy !

Global advancement tab

BlockFish advancement tab
Datapack available on cursed forge "All Tropical Fish Datapack"
- Edition: Minecraft Java
- File type: .zip (resource pack)
- Minecraft versions listed: 1.21.9, 1.21.10, 1.21.11
- How to install: Download the .zip resource pack — do not unzip it. → Put it in .minecraft/resourcepacks. → Enable it in Options → Resource Packs.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java resource packs walks through it step by step.
All Tropical Fish Collection is a free Minecraft Java resourcepack. Compatible with Minecraft 1.21.9, 1.21.10, 1.21.11, 1.21.5 and newer. Downloaded 21,090 times (via CurseForge). Download it and open it directly in the game.