Minecraft wiki entry for Turtle_farming, associated text: A turtle farm, turtle shell farm, or scute farm is a means of breeding turtles to harvest scutes, which are used to craft a turtle helmet. In addition to having the same defense value as an iron helmet, it has greater durability than an iron helmet, and grants the water breathing status effect for 10 seconds. Also, a turtle helmet can be enchanted with Respiration for an additional 15 seconds underwater. Another use for a turtle farm are potions of the turtle master, an extremely powerful potion that can be used for PvP. This tutorial describes a turtle farm that can reasonably be built in survival mode.