Penguins Mod
Penguins Mod 1.12.2 adds a single variety of penguins that spawn in all cold biomes. Purely aesthetic, no practical purpose (other than looking at adorable penguins).
Screenshots:
Small Waddle of Penguins
Up Close and Personal
Requires:
How to install:
How To Download & Install Mods with Minecraft Forge
How To Download & Install Fabric Mods