Coral harvesting methods cause damage to coral reef ecosystems faster than the ecosystems can recover. Blast fishing is used because it maximizes the harvesting of fish, but it is also destructive to surrounding coral. Cyanide harvesting has similar effects. It can often kill coral along with the fish that it is targeting. Coral harvesting targets coral. If large portions of coral are removed it is difficult for the ecosystem to recover, as the coral as essential for the ecosystem and grows slowly over a period of many years.