Reviews of the Deep-Sea Fishery Resources and its utilization in the Southeast Asian Region.
The “deep-sea” can be classified into four zones in common; the mesopelagial is uppermost and ranges from 200 to 1,000 m; the bathypelagic occupies the 1,000-4,000 m depth zone; the abyssopelagic goes from 4,000 to 6,000 m and the hadal zone for the habitat of the deep ocean trenches (FAO, 2005). Various consideration had been made for define of what is the deep sea, some works used the depth-based zonation of mesopalagic as the start of the deepwater habitat. According to the recent “FAO Workshop on the Vulnerable Ecosystems and Destructive Fishing in Deep-Sea Fisheries“ (FAO, 2008), the “deep sea” is clarified as “The marine environment that extends downwards from the continental shelf break, i.e. waters deeper than 200 m to its maximum depth. Deep-sea fisheries currently only operate at depths of less than about 2,000 m. However, the deep-sea environment extends to the maximum depths of the ocean and future prospective exploitation that may occur in deeper waters is included”.