Tuna stock for the four main species has fallen to historically low levels, the Secretariat of the Pacific Community said.
SPC Fisheries boss Mike Batty said many Pacific Island countries relied on tuna fisheries for employment, food security and income.
The secretariat said in a statement the viability of the Western Central Pacific tuna fishery was at risk from a failure to reach decisions on management because of competing political and economic goals.
Recent analyses by the Secretariat of Pacific Community (SPC) fisheries scientists show that over fishing of bigeye tuna was already a problem, while the albacore tuna catch has risen rapidly to levels that threaten the profitability of Pacific Island fisheries, the secretariat said.