Rana

Rana was a passive mob that existed for the majority of Java Edition Indev 0.31.

Spawning
Rana spawned randomly in the world in groups with other Ranas. They could spawn at any light level as long as there was enough space.

Behavior
Rana was a passive mob. It had no animation, so it glided aimlessly around the world in the same pose. How Rana's animation was supposed to play : https://minecraft.gamepedia.com/File:Rana.gif

Drops
Rana did not drop any items in-game.

Trivia

 * Rana was created by Dock for a project of his own years ago. When he joined the Minecraft development team, he recreated her in a new style for the game.
 * Rana means "frog" in Latin, and, through linguistic evolution, Spanish and Italian.