The Turtle Shell in Minecraft is a piece of headgear that allows players to breathe underwater for an additional 10 seconds and provides 2 armor points of protection. To obtain a Turtle Shell, players must find and breed turtles in beach biomes to collect scutes. The breeding process involves feeding two turtles seagrass, which leads to egg-laying. After the eggs hatch and the baby turtles mature, they drop scutes. Players need five scutes to craft one Turtle Shell by arranging them in a helmet pattern on a crafting table. The Turtle Shell can also be enchanted for extended underwater exploration.