In addition to decimating local populations of reef fishes, such as the Napoleon wrasse, the fish trade also damages the reef itself. A common fishing method is the use of cyanide to stun the fish, but this poison also kills the coral as well as other reef-dwelling animals. Another destructive method is the use of explosives. And has been observed countless times before in nature, removal of one species tends to lead to changes in other population numbers, from loss of either prey or predator.
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