Minecraft Dungeons:Baby Ghast

The Baby Ghast is a pet mob $$ obtained through the Flames of the Nether DLC. It is purely cosmetic and does not attack enemies, nor do any enemies target it.

Appearance
The Baby Ghast is a juvenile form of the ghast. They are characterized by having small white translucent bodies with a red core inside, a small mouth, red eyes, and small tentacles, making its appearance akin to a jellyfish. The whole body of the Baby Ghast is smaller and almost the size of the player's head and it also disappears when you are away and appears when you are close.

Trivia

 * The Baby Ghast is currently the only pet that is based on a hostile mob.

The Baby Ghast does say in it's description that it shoots fireballs accidentally, but does not in game. The Baby Ghast is so small, but the game says that it can shoot accidental fireballs, so it is not fully known why the organs of a fully grown ghast are huge, but they still exist, and work in the juvenile form.