Reef breaks are a type of surf break that occurs when ocean waves break over a coral reef. These waves can create powerful and fast rides for surfers, making them popular spots for surfing. The shape and depth of the reef influence the wave's size and quality, often resulting in hollow, barreling waves that are sought after by experienced surfers. The conditions for reef breaks can vary based on factors like tide, swell direction, and wind. Some famous reef breaks include Teahupo'o in Tahiti and Pipeline in Hawaii. Surfers must be cautious, as the shallow reefs can pose risks of injury.