Sponge

Sponge
Sponge is a non renewable block which can be found in underwater dungeons. Each underwater dungeon is guaranteed to have one sponge underneath the spawner with a small chance of finding additional sponges in the loot chests.

Obtaining
Picking up sponge can be done with your fist or any tool.

Crafting
Sponges can be used to craft sponge armour.