* These threats -The big challenge is always Poor for solving any of the problems of preservation in the country, especially in the developing countries-Poor led to the undermining of fish resources in any way, such as using explosives, smoking fish, electric xiệt, John l described below.-Aquaculture is developed in many regions not appropriate such as grown in the mangrove swamp pond usually only lasts a few years.-Pollution (from the waste and industrial activities, and from cosmetics)-Increasing the movement of ships across the river.-Mining of the iron ore mines.-The sediment dredging from the long on land in the big Harbour and land erosion.-Expanded the layer of sand stone-Agricultural drainage-Expand the facilities to build and grow.-Hunting the fish overflow lang
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