The João Valente Bank is a coral reef located between the islands of Boa Vista () and Maio (), Cape Verde. It stands on a seamount (guyot) about 100 meters under sea level, and rises up to 10 m below the surface. The seamount rises from about 1,000 meters. It is about 15 nmi long and 9 nmi wide, and breaking waves can already be observed at moderate wind.Deutsches Hydrographisches Institut, Handbuch der Nordatlantischen Inseln., 28 July 1934, p. 218. The reef has a high biodiversity of fish.
