Cyanide fishing Cyanide fishing is used as a method to capture live fish to supply the international aquarium trade, and more recently, to supply the demand for live reef fish by restaurants. This method involves the spraying of sodium cyanide into the targeted fish's habitat as a means of stunning the fish without killing them. For each fish captured using sodium cyanide, a square metre of coral reef is destroyed. Dynamite fishing Dynamite fishing or blast fishing is a technique that detonates explosives underwater in order to easily kill schools of fish and maximize yield. The dead or stunned fish then floats to the surface of the water where they can be easily harvested. Along with the fish, the entire ecosystem, such as coral reefs, and other marine organisms within the blast radius can be destroyed; which in the coral reef's case, can take hundreds of years to rebuild. Ghost fishing Ghost fishing is classified as passive gear that occurs when fishing gear has been left or lost in the ocean. The gear can potentially continue to catch or entangle any species of marine life as it drifts through the water or snags on rocky reef, eventually killing the entangled organism through laceration, suffocation or starvation. By-catch By-catching is an inevitable aspect of fishing where unwanted fish or other marine organisms including turtles, dolphins and juveniles are caught. This is a by-product of the unselective nature of modern fishing gear, such as bottom trawling which captures everything in the path of the net. Consumer-grade gear such as fishing rods and nets are used by pirate fishers to undertake illegal, unreported and unregulated fishing which adds to the number of marine species taken from their ecosystems. Evidence that these methods are unsustainable Examples of the use of unsustainable fishing methods exist globally and not only impacts the harvested species, but also all marine species that coexist or rely on the targeted harvest. Bottom trawling in Canadian waters have shown the destructive effects of the fishing method. With the establishment of Baffin Bay fishery in 1996, feeding grounds for narwhals in the Canadian Arctic are shown to be impacted by vast benthic damage as a result of bottom trawling. Hence why leading marine environmentalists describes bottom trawling as a 'great harm' to fisheries. In the 1960s, the commercial use of poisons such as sodium cyanide (cyanide fishing), were used throughout Southeast Asia