Dozens of drum species are found in tropical waters of the Atlantic and Pacific oceans and in the Gulf Mexico. Of greatest value in a niche U.S. market are the red drum and black drum, named for the loud drumming noise they make by contracting muscles connected to their air bladders. Red drum is the species of blackened redfish fame, overharvested to the point of closing the U.S. fishery. It is now imported from Mexico, Argentina, Ecuador and Central America and commands high prices. Farmed product from Texas, Taiwan and Ecuador supplements limited wild supplies. Demand has shifted to the more plentiful, lower-priced black drum, found from Virginia to the northern Gulf of Mexico, though restrictions on commercial fishing have tightened supplies of this species as well.