@Alaia

An alaia (pronounced /ɑːˈlaɪɑː/, Hawaiian: [əˈlɐjjə]) is a thin, round-nosed, square-tailed surfboard ridden in pre-20th century Hawaii. The boards were about 200 to 350 cm (7 to 12 ft) long, weighed up to 50 kg (100 lb), and generally made from the wood of the Koa Tree. They are distinct from modern surfboards in that they have no ventral fins, and instead rely on the sharpness of the edges to hold the board in the face of the wave.